Inventor

Sadao Takehara

Inventor

Chiba, JP

Overview

1989–2007

Patent span

Chemistry

Primary field (CPC C)

Patents· 23 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 elsewhere47%

C07CAcyclic or carbocyclic compounds29%

C07DHeterocyclic compounds11%

B01DSeparation4%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry4%

C07BGeneral methods of organic chemistry4%

PatentTitleYear

7,214,835'1,7,8-Trifluoronaphthalene-2-naphthol, and method for producing liquid crystal compound using same'2007 7,145,047'Naphthalene derivative and liquid crystal composition comprising the same'2006 7,067,179'Fused ring compound'2006 6,913,797'Decahydronaphthalene derivative'2005 6,746,728'Compound having tetrahydronaphthalene skeleton and liquid crystal composition containing same'2004 6,693,223'Fluorine-substituted-4-alkenylbenzoic acid and derivatives thereof, and nematic liquid crystal composition containing cyanophenyl benzoate derivatives and liquid crystal display system using the same'2004 6,582,626'Polymerizable compound, polymerizable liquid crystal composition containing the same, and optically anisotropic medium made from the composition'2003 6,468,607'Naphthalene derivative and liquid crystal composition comprising the same'2002 6,399,035'Reduction purification method of nitrogen oxide-containing exhaust gas'2002 6,287,646'Fluorine-substituted-4-alkenylbenzoic acid and derivatives thereof, and nematic liquid crystal composition containing cyanophenyl benzoate derivatives and liquid crystal display system using the same'2001 6,030,590'Reduction purification method of nitrogen oxide-containing exhaust gas'2000 6,010,642'Azine derivative, process for the preparation thereof, nematic liquid crystal composition and liquid crystal display system comprising same'2000 5,536,443'Cyclic hydrocarbon derivative and liquid crystal composition containing the same'1996 5,474,707'Cyclic hydrocarbon derivative and liquid crystal composition containing the same'1995 5,324,451'Lactic acid derivatives and liquid crystal compositions containing the same'1994 5,128,472'2,5-disubstituted pyrazine derivatives, pyrimidine derivatives, and liquid crystal containing the same'1992 5,064,564'Optically active compound, intermediate therefor, process for producing the intermediate, and liquid-crystal composition'1991 5,061,398'Optically active lactone derivative, intermediate therefor, process for producing the intermediate, liquid-crystal composition, and liquid-crystal display device'1991 4,997,942'2,4-disubstituted pyrazine derivatives, pyrimidine derivatives, and liquid crystal containing the same'1991 4,943,386'Liquid crystalline compounds having substituents'1990 4,914,224'Optically active carboxylic acid derivatives and liquid crystalline compositions comprising them'1990 4,911,862'Optically active carboxylic acid derivatives and liquid crystalline compositions comprising them'1990 4,828,754'Novel liquid crystalline compounds having substituents'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–2007Patents assigned to DAINIPPON INK & CHEMICALS (21)· patent assignee history

1989–1994Patents assigned to KAWAMURA INST CHEM RES (8)· patent assignee history

1989–1990Based in Yono, JP· patent location history

1990–2007Based in Sakura, JP· patent location history

1991Patents assigned to SAGAMI CHEM RES (2)· patent assignee history

1991–2006Based in Chiba, JP· patent location history

1991–2002Based in Saitama, JP· patent location history

2000–2002Patents assigned to COSMO OIL CO LTD (2)· patent assignee history

2002Patents assigned to COSMO RES INST (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
DAINIPPON INK & CHEMICALS	21	1989–2007
KAWAMURA INST CHEM RES	8	1989–1994
COSMO OIL CO LTD	2	2000–2002
SAGAMI CHEM RES	2	1991
COSMO RES INST	1	2002

Locations

Location	Patents	Span
Chiba, JP	12	1991–2006
Sakura, JP	6	1990–2007
Saitama, JP	3	1991–2002
Yono, JP	2	1989–1990