Inventor

Klaus Berg

Inventor

Krefeld, DE

Overview

18→

Patents

1989–2002

Patent span

Chemistry

Primary field (CPC C)

Patents· 18 as inventor

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

C07Cprimary

C07CAcyclic or carbocyclic compounds32%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds14%

C08LCompositions of macromolecular compounds11%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry7%

C08JWorking-up7%

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

G11BInformation storage based on relative movement between record carrier and transducer7%

C07DHeterocyclic compounds4%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds4%

G03GElectrography4%

PatentTitleYear

6,486,363'Process for the manufacture of bis(4-hydroxyaryl)alkanes'2002 5,780,690'Bisphenol synthesis on modified ion-exchange resins using specially purified carbonyl compounds'1998 5,693,697'Flame-resistant polycarbonate moulding-compositions'1997 5,545,764'Process for the continuous production of high purity bisphenol A'1996 5,455,282'Process of regenerating sulfonic acid cation exchange resins with a mercaptoethylamine or thiazolidine'1995 5,395,857'Optimized ion exchanger beds for the synthesis of bisphenol A'1995 5,302,774'Process for the production of bisphenols'1994 5,269,887'Process for the purification of bisphenols'1993 5,210,328'Process for the preparation of substituted cycloalkylidene bisphenols'1993 5,128,437'Polycarbonate from bi(tetrahydrofuran)di phenol'1992 5,004,569'Process for the production of carboxylic acid esters'1991 4,980,426'Moulding compounds of polycarbonate mixtures having a high disperse solubility'1990 4,954,569'Use of homopolycarbonates of 3,3\'-dihydroxydiphenyl ether for modifying films of thermoplastics'1990 4,943,502'Photosensitive recording material suited for use in electrophotography containing dihydroquinoline charge transport compounds'1990 4,902,746'Use of mixtures of polycarbonates and styrene polymers as substrates for optical storage media'1990 4,874,816'Vinyl copolymers with grafted-on polycarbonate chains, their production and use'1989 4,873,314'Process for the production of polycarbonate solutions'1989 4,826,634'Fluorinated alkylamidosulphonates, their preparation, their use as flame retardants, and polycarbonate moulding compositions containing them'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–2002Patents assigned to BAYER AG (16)· patent assignee history

1989–2002Based in Krefeld, DE· patent location history

1990Patents assigned to AGFA GEVAERT NV (1)· patent assignee history

1990Patents assigned to BERG KLAUS (1)· patent assignee history

1990Patents assigned to BOTTENBRUCH LUDWIG (1)· patent assignee history

1990Patents assigned to GRIGO ULRICH (1)· patent assignee history

1990Based in Krefeld-Uerdingen, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BAYER AG	16	1989–2002
AGFA GEVAERT NV	1	1990
BERG KLAUSself	1	1990
BOTTENBRUCH LUDWIG	1	1990
GRIGO ULRICH	1	1990

Locations

Location	Patents	Span
Krefeld, DE	17	1989–2002
Krefeld-Uerdingen, DE	1	1990