Inventor

Dieter Freitag

Inventor

Krefeld, DE

Overview

1976–2018

Patent span

Chemistry

Primary field (CPC C)

Patents· 201 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C08Gprimary

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds36%

C08LCompositions of macromolecular compounds19%

C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients7%

C07CAcyclic or carbocyclic compounds6%

C08JWorking-up3%

Y10TTechnical subjects covered by former us classification3%

C07DHeterocyclic compounds3%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium3%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%

B01DSeparation2%

PatentTitleYear

9,938,381Flame retardant polyamide compositions2018 9,783,737'Amino terminated phosphonamide oligomers and flame retardant compositions therefrom'2017 9,745,424'Insoluble and branched polyphosphonates and methods related thereto'2017 9,527,984'Polyphosphonate and copolyphosphonate additive mixtures'2016 9,150,711'Flame retardant polyamide compositions'2015 8,975,367'Polyphosphonate and copolyphosphonate additive mixtures'2015 8,779,041'Oligomeric phosphonates and compositions including the same'2014 8,648,163'High molecular weight, random, bisphenol based copoly(phosphonate carbonate)s'2014 8,563,638'Oligomeric phosphonates and compositions including the same'2013 8,530,044'Hyperbranched oligomeric phosphonates and compositions including the same'2013 8,415,438'Method for the production of block copolycarbonate/phosphonates and compositions therefrom'2013 8,389,664'High molecular weight, random, bisphenol based copoly(phosphonate carbonate)s'2013 8,093,320'Compositions comprising polyphosphonates and additives that exhibit an advantageous combination of properties, and methods related thereto'2012 7,928,259'Diaryl alkylphosphonates and methods for preparing same'2011 7,888,534'Diaryl alkylphosphonates and methods for preparing same'2011 7,838,604'Method for the production of block copolycarbonate/phosphonates and compositions therefrom'2010 7,816,486'Branched polyphosphonates'2010 7,666,932'Compositions comprising polyphosphonates and additives that exhibit an advantageous combination of properties, and methods related thereto'2010 7,645,850'Poly(block-phosphonato-ester) and poly(block-phosphonato-carbonate) and methods of making same'2010 7,569,717'Diaryl alkylphosphonates and method for preparing same'2009 7,560,525'Crystalline polyphosphonates and methods related thereto'2009 6,984,341'Mixtures comprising thiophene/anion dispersions and certain additives for producing coatings exhibiting improved conductivity, and methods related thereto'2006 6,861,499'Branched polyphosphonates that exhibit an advantageous combination of properties, and methods related thereto'2005 6,692,663'Compositions produced by solvent exchange methods and uses thereof'2004 5,849,414'Production of scratch-resistant polycarbonate moulded parts'1998 5,668,232'Process for the production of polyisoolefins'1997 5,668,204'Stabilization of polycarbonates having high heat distortion temperatures'1997 5,512,632'Thermoplastic blends containing polyesters and polyester carbonates based on substituted cycloalkylidene bisphenols'1996 5,416,161'Production of blend systems by the condensation of oligocarbonates in the presence of mass-polymerized ABS'1995 5,416,143'Highly flame-retardant polyamide moulding compounds'1995 5,389,712'Difficultly flammable polyamide moulding materials'1995 5,373,082'Process for the production of thermoplastic polycarbonates'1994 5,340,905'Process for the preparation of thermoplastic polycarbonates'1994 5,334,692'Highly branched polyphosphonates based on melamine'1994 5,326,800'Use of salts in combination with halogenated phthalimides for flameproof finishing of glass fibre-containing polycarbonate moulded members'1994 5,317,083'Process for isolating polycarbonates from their solutions with tube having cross sectional contrictions'1994 5,314,985'Molten, catalytic process for the preparation of polycarbonates'1994 5,310,793'Mixtures of polyalkylene terephthalates, new polycarbonates and/or polyester-carbonates and elastomers'1994 5,300,550'Thermoplastic molding compositions'1994 5,288,848'Process for preparation of high molecular weight, optionally branched polyarylene sulphides'1994 5,269,887'Process for the purification of bisphenols'1993 5,248,763'Isolation of poly(ester)carbonates from methylene chloride using carbon dioxide fluid'1993 5,233,037'Production of caprolactam by thermal depolymerization of polyamide 6'1993 5,227,458'Polycarbonate from dihydroxydiphenyl cycloalkane'1993 5,210,328'Process for the preparation of substituted cycloalkylidene bisphenols'1993 5,194,467'Stabilization of highly heat distortion resistant polycarbonates'1993 5,191,001'Process for the production of solventless polycarbonate'1993 5,151,452'Purification of polycarbonate and polyester carbonate waste'1992 5,149,761'Aromatic ether imides'1992 5,147,700'Molding compositions of low double refraction'1992 5,145,920'Oligomer epoxy resins based on cyclohexyldiphenol derivatives and reaction products thereof with (meth)acrylic acid and diisocyanates'1992 5,145,911'Polycarbonate molding composition'1992 5,143,973'Moulding compositions of low double refraction'1992 5,137,970'Polycarbonate/ABS compositions of high heat resistance'1992 5,134,195'Ternary thermoplastic mixtures'1992 5,132,154'Polycarbonate mixtures in optical applications'1992 5,126,495'Thermoplastic polyester carbonate-polysiloxane block copolymers'1992 5,126,428'Polycarbonate from dihydroxy diphenyl cycloalkane'1992 5,115,050'Polyamide moulding compositions containing finely divided polyarylene sulphides'1992 5,109,076'Polydiorganosiloxane/polycarbonate block cocondensates based on certain dihydroxydiphenylcycloalkanes'1992 5,104,723'Mixtures of special new polycarbonates with other thermoplastics or with elastomers'1992 5,104,945'Heat resistant polycarbonate molding compositions'1992 5,105,004'Aromatic ethers'1992 5,104,963'Two-stage process for the production of polycarbonates based on special dihydroxydiphenylalkanes'1992 5,100,960'Thermoplastic molding compositions of a polysiloxane block copolycarbonate and a polycarbonate based on certain dihydroxydiphenylcycloalkanes'1992 5,086,159'Stabilized copolycarbonate from dihydroxy diphenyl cycloalkane'1992 5,086,157'Aromatic polyether sulphones based on dihydroxy-diphenyl-cyclo-alkanes and films therefrom'1992 5,084,550'Copolycarbonate from mixture of polyarylene diol'1992 5,081,269'Oligomer epoxy resins based on cyclohexyldiphenol derivatives and reaction products thereof with (meth)acrylic acid and diisocyanates'1992 5,076,987'Process for the production of optically isotropic extrusion films'1991 5,068,302'Polysiloxane-polycarbonate block copolymers based on certain dihydroxydiphenylcycloalkanes'1991 5,066,776'Process for the manufacture of polyarylene sulphides'1991 5,056,617'Diaphragm for loudspeaker'1991 5,041,521'Polyester-carbonate based on 1,1-bis-(4-hydroxyphenyl)-alkylcycloalkanes'1991 5,037,220'Printing ribbon comprising polycondensates'1991 5,037,939'Thermotropic, fully aromatic polyesters prepared by polycondensation of aromatic diphenols and aromatic carboxylic acids'1991 5,034,457'Thermoplastic blends containing polycarbonates based on substituted cyclohexylidenebisphenols'1991 5,034,458'Polycarbonates of substituted cyclohexylindenebisphenols'1991 5,032,661'Thermoplastic polyester-carbonate/polysiloxane block copolymers'1991 5,025,065'Fire-retardant polycarbonates and polyesters'1991 5,021,543'Process for the production of bifunctional OH-terminated polyphenylene oxides with dipolar aprotic solvent'1991 5,021,542'Polycarbonate of polysubstituted cyclohexylidene bisphenols'1991 5,010,162'Polycarbonate of alkyl cyclohexylidene bisphenol'1991 5,010,163'Polycarbonate of cycloalkylidene bisphenol'1991 5,010,147'High-strength polycarbonate mixtures'1991 4,994,579'Aromatic ether imides'1991 4,985,532'Thermotropic polyesters, a process for their production and their use for the production of moldings, filaments and films'1991 4,982,014'Dihydroxydiphenyl cycloalkanes, their production and their use for the production of high molecular weight polycarbonates'1991 4,970,249'Flameproofed, readily crystallizing polyethylene terephthalate molding compounds'1990 4,970,108'Multilayer films from the use in crash pads'1990 4,964,890'Aromatic polyether ketones'1990 4,961,179'Curable reaction compositions for producing data carriers'1990 4,908,216'Apparatus for the production of low tension moulded parts'1990 4,900,808'Process for the production of high molecular weight, optionally branched polyarylene sulphides in polar solvent and lactam'1990 4,888,370'Flame-resistant polyamides'1989 4,876,033'Moulded bodies containing carbon'1989 4,859,263'Process for the manufacture of printed circuits'1989 4,812,589'Polyhydroxyl compounds containing a sulfonic acid ester group'1989 4,806,619'Thermotropic aromatic polyesters having a high deflection temperature under load and excellent mechanical properties, a process for their preparation and their use for the production of moldings, filaments, fibres and films'1989 4,801,677'Thermotropic aromatic polyester with high thermal stability'1989 4,797,467'Thermoplastic polycarbonate branched with tetra-hydroxyaryl-bis-quinoxaline'1989 4,786,708'Use of films of polycondensates'1988 4,782,123'Process for the preparation of copolyphosphonates of high notched impact strength'1988 4,762,905'Aromatic thermoplastic polyphosphonatocarbonate'1988 4,746,711'Mixtures of aromatic polycarbonates and aromatic polyester-carbonates, and their use for the production of mouldings, films, fibres, filaments and coatings'1988 4,743,674'Aromatic polyesters, processes for their preparation, and their use for the preparation of molecularly reinforced polymers'1988 4,740,554'Thermoplastic moulding compositions based on polyphenylene oxide/polycarbonate block condensates'1988 4,739,058'Tetra-(hydroxyaryl)-bis-quinoxalines and preparation thereof'1988 4,732,967'Polyarylene sulphide having high melt viscosity'1988 4,719,279'Process for the preparation of copolyphosphonates having high toughness'1988 4,714,746'Process for the preparation of aromatic polyester-carbonates having improved notched impact strength, and polyester-carbonates prepared thereby and their use for the production of mouldings, films and coatings'1987 4,704,430'Thermoplastic moulding materials'1987 4,701,554'Process for the preparation of polyphosphonic acid amides'1987 4,690,998'Special epoxy resins'1987 4,681,922'Thermoplastic polysiloxane-polyester (carbonate) block copolymers, their preparation and use'1987 4,668,720'Flame resistant moulding compounds based on styrene polymers'1987 4,661,584'Preparation of polyarylene sulphide in presence of amino carboxylic acid'1987 4,654,411'High molecular weight polyesters, preparation and use thereof'1987 4,645,806'Use of certain polyphenylene oxides for the production of aromatic block polyether-poly(ester) carbonates by the interfacial process'1987 4,631,336'Process for the production of high molecular weight, optionally branched polyarylene sulphide with an ester or anhydride of a carboxylic acid'1986 4,617,368'Process for the production of colorless aromatic polyester and polyester carbonates'1986 4,603,190'Thermotropic aromatic polyesters having high rigidity and toughness, process for the production thereof and the use thereof for the production of moulded articles, filaments, fibres and films'1986 4,600,764'Thermotropic aromatic polyesters with good rigidity and toughness, process for the production thereof and the use thereof for the production of mouldings, filaments fibres and films'1986 4,600,753'Two stage process for the production of aromatic polyester-carbonate'1986 4,598,144'Process for the production of high molecular weight, optionally branched polyarylene sulphides'1986 4,564,669'Thermotropic aromatic polyesters having a high tenacity and an improved melt viscosity, and mouldings, filaments, fibres and films thereof'1986 4,533,702'Aromatic polyester carbonates having a high notched impact strength and a process for the production thereof'1985 4,508,890'Process for the preparation of thermoplastic aromatic polyphosphonatocarbonates with improved heat-aging resistance, and their use'1985 4,491,656'Polyphosphates and process of preparation'1985 4,487,698'Extraction of onium salts from process waters and waste waters'1984 4,482,693'Polyphosphates and the production thereof'1984 4,482,694'High molecular weight aromatic polyesters and processes for their production'1984 4,481,338'Flame-resistant polymer mixtures'1984 4,481,350'Process for the preparation of thermoplastic aromatic polyphosphonates containing small proportions of carbonate structures and product thereof'1984 4,463,130'Flame-resistant polymer mixtures'1984 4,450,249'Internal antistatic agents for polycarbonates and for polycarbonate films'1984 4,450,266'Use of siloxanes for the modification of high molecular weight p-polyphenylene sulphides'1984 4,433,138'Process for the preparation of polyarylene sulphides'1984 4,424,339'Process for the preparation of polyarylene sulphides'1984 4,415,719'Thermoplastic, branched aromatic polyphosphonates, and a process for their production'1983 4,405,554'Use of hydrogenated polybenzyls as a mould-release agent for aromatic polyesters'1983 4,404,363'Separation of diphasic mixtures containing aromatic polyesters'1983 4,401,802'Process for the preparation of thermoplastic aromatic polyphosphonatocarbonates with improved heat-ageing resistance, and their use'1983 4,393,009'Process for the preparation of aromatic dicarboxylic acid dichlorides'1983 4,382,898'Process for the production of aromatic carboxylic acid chlorides'1983 4,382,041'Process for the production of aromatic carboxylic acid chlorides'1983 4,375,525'Use of organic silicon compounds for stabilizing and brightening polycarbonates which are free from phosphites and free from boric acid esters'1983 4,374,971'Process for the preparation of thermoplastic aromatic polyphosphonates with improved thermal ageing resistance'1983 4,371,691'Preparation of polycarbonate from specific crude bisphenols'1983 4,366,276'Flame-resistant moulding materials based on thermoplastic aromatic polyesters and polyesters carbonates, a process for their production and their use in the production of moulded bodies'1982 4,362,864'Process for the preparation of polyarylene sulphides'1982 4,348,542'Process for the production of mixtures of alkylated aromatic hydroxy compounds'1982 4,342,681'Use of organic silicon compounds in combination with oxetane compounds, dioxanes or tetrahydrofuranes for stabilizing and brightening polycarbonates which are free from phosphites and free from boric acid esters'1982 4,338,429'Process for working up polycarbonates'1982 4,334,053'Process for the preparation of aromatic polyesters and the use thereof for the production of injection molded articles, films and coatings'1982 4,333,809'Cross-linkable polycarbonate elastomers, a process for their preparation and use for packaging medicines'1982 4,331,614'Aromatic polyphosphonates and a process for their production'1982 4,328,174'Aromatic polyester phosphonates'1982 4,322,373'Process for the preparation of aromatic dicarboxylic acid dichlorides'1982 4,322,520'Aromatic thermoplastic polyphosphonatocarbonate'1982 4,316,980'Process for the preparation of tetramethylated bisphenol polycarbonates'1982 4,308,216'Process for the preparation of aromatic dicarboxylic acid dichlorides'1981 4,307,039'Process for the preparation of aromatic dicarboxylic acid dichlorides'1981 4,297,455'Process for the preparation of carbonic acid aryl esters of polyester-diols lengthened via carbonate groups and their use for the preparation of polyester-diol bis-diphenol carbonates and polyester/polycarbonates'1981 4,281,101'Process for the preparation of aliphatic-aromatic polycarbonates with diphenol carbonate end groups and their use for the preparation of high-molecular, segmented, aliphatic-aromatic polycarbonate elastomers which can be processed as thermoplastics'1981 4,269,964'Polycarbonates with alkylphenyl end groups, their preparation and their use'1981 4,268,648'Resol resins prepared using butanol and tri-alkali metal phosphate'1981 4,267,303'Process for the preparation of polymers with diphenol carbonate end groups'1981 4,260,704'Resins based on novolaks, their production and their use as tackifiers'1981 4,260,695'Process for the preparation of aromatic polyesters'1981 4,233,431'Polycondensates containing hydroxyquinoline end groups, their use for the preparation of polymers containing metals and metal containing polycondensates'1980 4,232,134'Process for isolating boron-containing phenol/formaldehyde resins'1980 4,225,698'Optical components consisting of aromatic polyesters molded in the form of an optical lens'1980 4,221,645'Polycarbonates with end groups containing double bonds which can be crosslinked by UV light'1980 4,217,437'Process for the preparation of carbonic acid bis-diphenol esters of polyalkylene oxide-diols lengthened via carbonate groups and their use for the preparation of high-molecular, segmented polyether/polycarbonates which can be processed as thermoplastics'1980 4,217,297'Process for the preparation of carbonic acid aryl esters of polyester-diols lengthened via carbonate groups'1980 4,216,298'Process for the preparation of carbonic acid bis-diphenol esters of polyester-diols and their use for the preparation of high-molecular segmented polyester/polycarbonates which can be processed as thermoplastics'1980 4,208,489'Polycarbonate molding compositions with improved flame-repellency'1980 4,196,276'High-molecular weight, segmented, polycarbonate elastomers'1980 4,191,705'Process for the preparation of carbonic acid esters of polyester-polyols'1980 4,182,697'Process for the preparation of boron-containing phenol-formaldehyde resins'1980 4,174,437'Process for the preparation of branched polycarbonates'1979 4,170,587'Statistical mixtures of halogenated bisphenols with halogen-free bisphenols, a process for their preparation and their use for the preparation of high-molecular weight thermoplastic polycarbonates'1979 4,169,868'Process for the preparation of new high-molecular segmented polyester-polycarbonates which can be processed by thermoplastic methods and new polyester-polycarbonates obtained according to the process'1979 4,152,161'Photographic silver halide emulsion with hetero-N containing polymeric binder'1979 4,142,035'Polycondensates containing hydroxyquinoline end groups, their use for the preparation of polymers containing metals and metal containing polycondensates'1979 4,137,219'Polycondensates containing hydroxyquinoline end groups, their use for the preparation of polymers containing metals and metal containing polycondensates'1979 4,110,540'Process for the preparation of multinuclear phenols which are alkylated in the nucleus'1978 4,100,130'Flame-resistant polycarbonates'1978 4,081,495'Thermoplastic moulding compositions and mouldings of polycarbonates, with improved ease of mould release when injection-moulded'1978 4,080,371'Process for the production of .alpha., .alpha., .alpha., .alpha.\', .alpha.\' , .alpha.\'-hexakisaryl-1,3- and -1,4-dimethyl benzenes'1978 4,075,119'Statistical mixtures of halogenated bisphenols with halogen-free bisphenols'1978 4,073,757'Hardenable, boron-containing reinforcing resins for rubber'1978 4,048,200'1,1,2-Tris-(o/p-hydroxyphenyl)-1-phenyl-ethanes'1977 4,030,929'Photographic silver halide emulsion'1977 4,012,362'Polymers containing 8-hydroxyquinoline groups'1977 4,009,148'High molecular weight polycarbonates of .alpha.,.alpha.,.alpha.,.alpha.\',.alpha.\',.alpha.\'-hexakisaryl-1,3-and/o r -1,4-dimethyl benzenes'1977 4,001,183'Tetraphenol containing polycarbonates'1977 3,991,062'Polymerizable .alpha.,.beta.-monoolefinically unsaturated monomers carrying 8-hydroxyquinoyl groups'1976 3,983,146'Process for the production of .alpha., .alpha., .alpha., .alpha.\', .alpha.\' , .alpha.\', -hexakisaryl-1,3-and-1,4-dimethyl benzenes'1976 3,979,462'Condensation resins of phenols and .alpha.,.alpha.\'-dihydroxy-diisopropyl benzenes'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1998Patents assigned to BAYER AG (175)· patent assignee history

1976–2018Based in Krefeld, DE· patent location history

1976–1986Based in Krefeld-Traar, DE· patent location history

1991Based in Krefeld-Uerdingen, DE· patent location history

2004–2017Based in Chelmsford, MA, US· patent location history

2010–2018Patents assigned to FRX POLYMERS INC (19)· patent assignee history

2012–2017Patents assigned to FREITAG DIETER (8)· patent assignee history

2012–2017Patents assigned to GO PIN (3)· patent assignee history

2013–2017Patents assigned to KAGUMBA LAWINO (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BAYER AG	175	1976–1998
FRX POLYMERS INC	19	2010–2018
FREITAG DIETERself	8	2012–2017
KAGUMBA LAWINO	4	2013–2017
GO PIN	3	2012–2017

Locations

Location	Patents	Span
Krefeld, DE	179	1976–2018
Chelmsford, Massachusetts, US	13	2004–2017
Krefeld-Traar, DE	8	1976–1986
Krefeld-Uerdingen, DE	1	1991