Inventor

Atsuhiro Ohkawa

Inventor

Kanagawa, JP

Overview

1990–2009

Patent span

Chemistry

Primary field (CPC C)

Patents· 41 as inventor

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

G03Cprimary

G03CPhotosensitive materials for photographic purposes28%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests24%

C09KMaterials for miscellaneous applications, not provided for elsewhere13%

B41MPrinting, duplicating, marking, or copying processes11%

C07DHeterocyclic compounds9%

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

C07CAcyclic or carbocyclic compounds3%

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

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments3%

G02BOptical elements, systems or apparatus3%

PatentTitleYear

7,534,475'Liquid crystal compound comprising two condensed and substituted rings'2009 7,534,371'Liquid crystalline compound, liquid crystalline composition and retardation film'2009 7,364,670'Liquid crystalline compound, liquid crystalline composition and retardation film'2008 7,314,654'Optically anisotropic element comprising discotic compound'2008 7,273,641'Optically anisotropic element comprising discotic compound'2007 7,250,116'Liquid crystal composition, polymerization product, retardation plate and ellipsoidally polarizing plate'2007 7,175,889'Retardation film and compound'2007 7,169,325'Liquid crystalline compound, liquid crystalline composition and retardation film'2007 7,153,548'Compound, retardation plate and method for forming optically anisotropic layer'2006 7,128,953'Optical film comprising support and polarizing layer'2006 6,562,542'Image-forming material and novel sulfonic acid ester derivative'2003 6,432,876'Image-recording medium containing self-developing leuco dye'2002 6,409,328'Method of forming images and material for image formation'2002 6,329,120'Image recording medium, image recording method and heat coloring polymer compound'2001 6,329,121'Image recording medium, image recording method and heat coloring polymer compound'2001 6,316,161'Image recording medium comprising compound generating acid by action of heat, acid or light'2001 6,203,964'Image recording medium and image recording method'2001 6,197,725'Heat-sensitive recording material'2001 6,143,480'Leuco dye and image recording medium containing the same'2000 6,100,009'Image recording medium, image recording method and heat coloring polymer compound'2000 6,060,206'Photo- and heat-sensitive recording material and colorant produced from the material'2000 6,051,359'Heat developable light-sensitive material and method of forming color images'2000 5,837,438'Silver halide color photographic photosensitive material'1998 5,665,529'Color diffusion transfer photographic material'1997 5,547,824'Silver halide color photographic light-sensitive material containing compounds capable of releasing photographically useful groups and a specific silver iodobromide'1996 5,529,894'Silver halide photographic material containing a coupler capable of releasing a plurality of photographically useful groups or precursors thereof'1996 5,514,529'Silver halide color photographic light-sensitive material containing chemically sensitized grains and pug compound'1996 5,498,513'Silver halide color photographic photosensitive materials'1996 5,496,680'Color diffusion transfer element with benzenesulfonamide'1996 5,447,833'Silver halide photographic material and imidazole derivatives'1995 5,403,703'Silver halide color photographic light-sensitive material, and method or processing the same'1995 5,362,877'Process of synthesizing acetals'1994 5,360,709'Silver halide photographic material containing a DIR compound'1994 5,350,666'Silver halide photographic materials'1994 5,326,680'Silver halide color photographic light-sensitive material'1994 5,306,603'Silver halide color photographic light-sensitive material, and method of processing the same'1994 5,286,620'Silver halide color photographic material'1994 5,112,730'Silver halide color photographic material comprising a yellow-colored cyan coupler'1992 5,104,988'4\'-alkoxy-2,2\':6\',2\"-terpyridine derivatives and metal complexes thereof'1992 5,021,329'Silver halide photographic material containing a dye precursor residue'1991 4,960,895'4\'-alkoxy-2,2\':6\',2\"-terpyridine derivatives'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2007Patents assigned to FUJI PHOTO FILM CO LTD (35)· patent assignee history

1990–2008Based in Kanagawa, JP· patent location history

1991–2001Based in Minami-ashigara, JP· patent location history

2007–2009Patents assigned to FUJIFILM CORP (6)· patent assignee history

2009Based in Ashigarakami-gun, JP· patent location history

2009Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJI PHOTO FILM CO LTD	35	1990–2007
FUJIFILM CORP	6	2007–2009

Locations

Location	Patents	Span
Kanagawa, JP	32	1990–2008
Minami-ashigara, JP	7	1991–2001
Ashigarakami-gun, JP	1	2009
Tokyo, JP	1	2009