Inventor

Susumu Suzuka

Inventor

Yono, JP

Overview

1976–2006

Patent span

Chemistry

Primary field (CPC C)

Patents· 35 as inventor

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

G03Gprimary

G03GElectrography35%

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

C07DHeterocyclic compounds12%

B41MPrinting, duplicating, marking, or copying processes11%

C07CAcyclic or carbocyclic compounds8%

C09DCoating compositions, e.g. paints, varnishes or lacquers8%

G03CPhotosensitive materials for photographic purposes5%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments2%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices2%

PatentTitleYear

7,071,285'Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatus'2006 6,919,419'AROMATIC BLOCK POLYCARBONATE RESIN, DIPHENOL COMPOUND FOR PREPARATION OF THE POLYCARBONATE RESIN, ELECTRO-PHOTOGRAPHIC PHOTOCONDUCTOR, ELECTRO-PHOTOGRAPHIC IMAGE FORMING APPARATUS AND PROCESS, AND PROCESS CARTRIDGE'2005 6,858,161'Method for purifying electronic item material'2005 6,790,571'Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatus'2004 6,664,361'Diphenol compound, aromatic polycarbonate and electrophotoconductive photoconductor'2003 6,576,386'AROMATIC BLOCK POLYCARBONATE RESIN, DIPHENOL COMPOUND FOR PREPARATION OF THE POLYCARBONATE RESIN, ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND PROCESS, AND PROCESS CARTRIDGE'2003 6,486,293'Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductor'2002 6,303,736'Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductor'2001 6,194,535'Electrophotographic photoconductor and aromatic polycarbonate resin for use therein'2001 6,187,494'Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductor'2001 6,187,492'Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductor'2001 6,172,176'Electrophotographic photoconductor and aromatic polycarbonate resin for use therein'2001 6,130,310'Electrophotographic photoconductor and aromatic polycarbonate resin for use therein'2000 6,066,428'Electrophotographic photoconductor and aromatic polycarbonate resin for use therein'2000 6,045,959'Electrophotographic photoconductor and aromatic polycarbonate resin for use therein'2000 5,976,746'Electrophotographic photoconductor and aromatic polycarbonate resin for use therein'1999 5,260,156'1,3-pentadiene derivatives and electrophotographic photoconductor using the same'1993 5,252,750'Polyolefin amino derivatives'1993 5,166,438'1,3-pentadiene derivatives and electrophotographic photoconductor using the same'1992 5,068,350'Polyolefin derivatives'1991 4,965,157'Electrophotographic photoconductor and polyolefin derivatives employed in the same photoconductor'1990 4,908,225'Use of a resin powder composition for electrostatic coating'1990 4,780,553'Electrophotographic toner and compounds useful for the toner'1988 4,694,088'Fluoran compounds'1987 4,683,188'Electrophotographic toner containing metal complex charge control agent'1987 4,642,663'6-tetrahydrofurfurylaminofluoran compound useful as a color former on an heat sensitive recording sheet'1987 4,612,558'Fluoran compounds'1986 4,597,795'6-tetrahydrofurfurylaminofluoran compound useful as a color former'1986 4,550,329'Heat sensitive record material'1985 4,539,577'Heat sensitive record material'1985 4,521,605'Carbazole compounds and process for preparing the same'1985 4,465,761'Image-forming photosensitive composition'1984 4,019,907'Photosensitive azido color-forming element'1977 4,003,747'Photosensitive azide compound containing color-forming element'1977 3,930,672'Pressure-sensitive copying paper containing lactone compounds derived from pyridine-carboxylic acid'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2005Patents assigned to HODOGAYA CHEMICAL CO LTD (22)· patent assignee history

1976–1990Based in Tokyo, JP· patent location history

1984Patents assigned to ORIENTAL PHOTO IND CO LTD (1)· patent assignee history

1985–2006Patents assigned to RICOH KK (20)· patent assignee history

1985–1993Based in Yono, JP· patent location history

1999–2001Based in Saitama, JP· patent location history

2001–2006Based in Kanagawa, JP· patent location history

2005Based in Ibaraki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HODOGAYA CHEMICAL CO LTD	22	1976–2005
RICOH KK	20	1985–2006
ORIENTAL PHOTO IND CO LTD	1	1984

Locations

Location	Patents	Span
Yono, JP	13	1985–1993
Kanagawa, JP	8	2001–2006
Saitama, JP	6	1999–2001
Tokyo, JP	6	1976–1990
Ibaraki, JP	1	2005