Inventor

Ludwig Pohl

Inventor

Darmstadt, DE

Overview

1976–2008

Patent span

Chemistry

Primary field (CPC C)

Patents· 66 as inventor

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

C09Kprimary

C09KMaterials for miscellaneous applications, not provided for elsewhere27%

C07CAcyclic or carbocyclic compounds15%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium11%

C07DHeterocyclic compounds6%

C23CCoating metallic material6%

C30BSingle-crystal growth4%

C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds3%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds3%

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

Y10TTechnical subjects covered by former us classification3%

PatentTitleYear

7,445,818'Matrix liquid crystal display'2008 7,186,447'Matrix liquid crystal display'2007 6,905,740'Matrix liquid crystal display'2005 6,596,890'Aluminum alkyl complexes as cocatalysts'2003 6,562,419'Matrix liquid crystal display'2003 6,107,493'Preparation of cyclic perfluoroalkanebis (sulfonyl) imides'2000 6,048,643'Process for preparing lithium intercalation compounds'2000 6,004,479'Matrix liquid crystal display'1999 5,879,654'Process for preparing lithium intercalation compounds'1999 5,851,946'Coordination catalyst systems comprising intramolecularly stabilized organometallic compounds'1998 5,698,309'Molded bodies made of polyester containing covalent-bonded oxide particles'1997 5,698,761'Coordination catalyst systems'1997 5,618,872'Inorganic fillers and organic matrix materials with refractive index adaptation'1997 5,519,525'Matrix liquid crystal display'1996 5,494,949'Surface-modified oxide particles and their use as fillers and modifying agents in polymer materials'1996 5,487,357'Boron-containing organic group-V compounds useful for gas phase deposition of the group-V element on substrates'1996 5,468,707'Coordination catalyst systems'1995 5,378,395'Matrix liquid crystal display'1995 5,259,915'Organometallic compounds'1993 5,234,716'Organometallic adduct compounds'1993 5,235,078'Heterocyclic organometallic compounds'1993 5,209,952'Use of organometallic compounds to deposit thin films from the gas phase'1993 5,149,853'Organometallic compounds'1992 5,122,295'Matrix liquid crystal display'1992 5,112,432'Organometallic compounds'1992 5,108,652'Cyclohexane derivatives'1992 5,099,044'Organometallic compounds'1992 5,030,741'Cyclic organometallic compounds'1991 5,015,747'Organometallic compounds'1991 4,986,931'Cyclohexane derivatives'1991 4,935,160'Liquid-crystal guest-host systems'1990 4,882,082'Nitrogen-containing hetercyclic compounds'1989 4,880,492'Organometallic compounds'1989 4,846,998'Cyclohexane derivatives'1989 4,812,258'Fluorine-containing pyrimidine derivatives'1989 4,752,414'Nitrogen-containing heterocyclic compounds'1988 4,713,197'Nitrogen-containing heterocyclic compounds'1987 4,707,295'Bicyclooctane derivatives'1987 4,545,922'Liquid crystalline fluorine-containing cyclohexylbiphenyls and dielectrics and electro-optical display elements based thereon'1985 4,510,069'Cyclohexane derivatives'1985 4,505,837'Liquid crystalline phenylcyclohexene derivatives'1985 4,469,618'Liquid crystal mixture'1984 4,464,283'Liquid crystal composition'1984 4,419,264'Fluorine-containing 4,4\'-bis-(cyclohexyl)-biphenyl derivatives, and dielectrics and electro-optical display elements containing them'1983 4,415,470'Liquid crystalline fluorine-containing cyclohexylbiphenyls and dielectrics and electro-optical display elements based thereon'1983 4,402,849'Liquid-crystalline tetrahydroquinazolines'1983 4,400,293'Liquid crystalline cyclohexylphenyl derivatives'1983 4,398,803'Liquid crystal display element'1983 4,386,007'Liquid crystalline naphthalene derivatives'1983 4,382,012'Liquid crystalline diketones'1983 4,331,552'Liquid crystalline, partially hydrogenated oligo-1,4-phenylenes and dielectrics and electro-optical display elements containing them'1982 4,330,426'Cyclohexylbiphenyls, their preparation and use in dielectrics and electrooptical display elements'1982 4,302,352'Fluorophenylcyclohexanes, the preparation thereof and their use as components of liquid crystal dielectrics'1981 4,297,515'Diketones useful as liquid crystals'1981 4,285,829'Liquid-crystalline dielectric'1981 4,237,026'Liquid crystalline carboxylic acid esters'1980 4,229,315'Liquid crystalline cyclohexane derivatives'1980 4,214,819'Electro-optical modulator'1980 4,181,625'Liquid crystalline cyclohexylcyclohexanes'1980 4,154,697'Liquid crystalline hexahydroterphenyl derivatives'1979 4,130,502'Liquid crystalline cyclohexane derivatives'1978 4,118,335'Liquid crystalline materials of reduced viscosity'1978 4,077,900'Liquid crystalline dielectric composition'1978 4,073,742'Cyano-substituted biphenyl compounds and liquid crystalline dielectrics containing the same'1978 4,026,953'Solvents for NMR spectroscopy'1977 3,954,410'Solvents for NMR spectroscopy'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2008Patents assigned to MERCK PATENT GMBH (62)· patent assignee history

1976–2008Based in Darmstadt, DE· patent location history

1984Patents assigned to HITACHI LTD (2)· patent assignee history

1993Patents assigned to MERCK PATENT GES BESCHRAENKTER (1)· patent assignee history

1993Based in Darmstad, DE· patent location history

1996–1997Patents assigned to HOECHST AG (2)· patent assignee history

1999Patents assigned to MERCK KGAA (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MERCK PATENT GMBH	62	1976–2008
HITACHI LTD	2	1984
HOECHST AG	2	1996–1997
MERCK KGAA	1	1999
MERCK PATENT GES BESCHRAENKTER	1	1993

Locations

Location	Patents	Span
Darmstadt, DE	65	1976–2008
Darmstad, DE	1	1993