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last 30 patents
Information
Patent Grant
Electrophotographic photoreceptor, and method for producing electro...
Patent number
8,980,512
Issue date
Mar 17, 2015
Ricoh Company, Ltd.
Yoshiaki Kawasaki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoreceptor, and image forming method, image...
Patent number
8,835,084
Issue date
Sep 16, 2014
Ricoh Company, Ltd.
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Furan derivative and electrophotographic photoconductor
Patent number
8,652,713
Issue date
Feb 18, 2014
Ricoh Company, Ltd.
Hongguo Li
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Acrylic ester compound and manufacturing intermediate thereof, meth...
Patent number
8,623,577
Issue date
Jan 7, 2014
Ricoh Company, Ltd.
Tamotsu Horiuchi
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Image bearing member
Patent number
8,481,234
Issue date
Jul 9, 2013
Ricoh Company, Ltd.
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor, and image forming apparatus and...
Patent number
8,192,904
Issue date
Jun 5, 2012
Ricoh Company, Ltd.
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photoreceptor, image formation method, image forming apparatus and...
Patent number
7,985,520
Issue date
Jul 26, 2011
Ricoh Company, Ltd.
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoreceptor, and image forming apparatus and...
Patent number
7,858,278
Issue date
Dec 28, 2010
Ricoh Company Limited
Hiroshi Ikuno
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor and method of preparing same
Patent number
7,718,333
Issue date
May 18, 2010
Ricoh Company, Ltd.
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Organic-inorganic hybrid material and method of preparing the organ...
Patent number
7,691,931
Issue date
Apr 6, 2010
Ricoh Company Ltd.
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photoconductor, producing method thereof, image forming process and...
Patent number
7,659,044
Issue date
Feb 9, 2010
Ricoh Company, Ltd.
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoreceptor, and image forming method, image...
Patent number
7,629,094
Issue date
Dec 8, 2009
Ricoh Company, Ltd.
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoreceptor, and image forming method, appara...
Patent number
7,556,903
Issue date
Jul 7, 2009
Ricoh Company Limited
Yoshiki Yanagawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoreceptor, and image forming method, image...
Patent number
7,507,509
Issue date
Mar 24, 2009
Ricoh Company, Ltd.
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor, and image formation method, ima...
Patent number
7,416,823
Issue date
Aug 26, 2008
Ricoh Company, Ltd.
Yoshiki Yanagawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor, and image forming process, imag...
Patent number
7,361,438
Issue date
Apr 22, 2008
Ricoh Company, Ltd.
Tetsuro Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor having a crosslinked resin layer...
Patent number
7,279,260
Issue date
Oct 9, 2007
Ricoh Company, Ltd.
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor, and image forming process, imag...
Patent number
7,179,573
Issue date
Feb 20, 2007
Ricoh Company, Ltd.
Tetsuro Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor, and image forming process, imag...
Patent number
7,175,957
Issue date
Feb 13, 2007
Ricoh Company, Ltd.
Tetsuro Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor, process for forming an image, i...
Patent number
7,175,958
Issue date
Feb 13, 2007
Ricoh Company, Ltd.
Masayuki Shoshi
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Electrophotographic photoconductor, and process cartridge and elect...
Patent number
6,939,651
Issue date
Sep 6, 2005
Ricoh Company, Ltd.
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor, electrophotographic apparatus a...
Patent number
6,899,983
Issue date
May 31, 2005
Ricoh Company, Ltd.
Nozomu Tamoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photoconductor, process for forming an image, i...
Patent number
6,849,367
Issue date
Feb 1, 2005
Ricoh Company, Ltd.
Masayuki Shoshi
C07 - ORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR AND METHOD FOR PRODUCING THE SAME
Publication number
20140170544
Publication date
Jun 19, 2014
Yoshiaki KAWASAKI
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTORECEPTOR, AND METHOD FOR PRODUCING ELECTRO...
Publication number
20130330663
Publication date
Dec 12, 2013
Yoshiaki KAWASAKI
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, AND IMAGE FORMING METHOD, IMAGE...
Publication number
20130122410
Publication date
May 16, 2013
Kazukiyo NAGAI
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
FURAN DERIVATIVE AND ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR
Publication number
20120171601
Publication date
Jul 5, 2012
RICOH COMPANY, LTD.
Hongguo Li
C07 - ORGANIC CHEMISTRY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTORECEPTOR, AND IMAGE FORMING METHOD, IMAGE...
Publication number
20120087695
Publication date
Apr 12, 2012
Kazukiyo NAGAI
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
IMAGE BEARING MEMBER
Publication number
20120064444
Publication date
Mar 15, 2012
RICOH COMPANY, LTD.
Hongguo LI
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE FORMING METHOD, IMAGE FORM...
Publication number
20120028179
Publication date
Feb 2, 2012
Hongguo LI
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
ACRYLIC ESTER COMPOUND AND MANUFACTURING INTERMEDIATE THEREOF, METH...
Publication number
20110287353
Publication date
Nov 24, 2011
Tamotsu HORIUCHI
C07 - ORGANIC CHEMISTRY
Information
Patent Application
ELECTROPHOTOGRAPHIC POHOTORECEPTOR, IMAGE FORMING METHOD, IMAGE FOR...
Publication number
20110065032
Publication date
Mar 17, 2011
RICOH COMPANY , LTD.
Kazukiyo NAGAI
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Photoreceptor, image formation method, image forming apparatus and...
Publication number
20090162763
Publication date
Jun 25, 2009
Ricoh Company, Ltd.
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image bearing member, method of manufacturing the same, image forma...
Publication number
20080304867
Publication date
Dec 11, 2008
Ricoh Company, Ltd.
Kazukiyo Nagai
C07 - ORGANIC CHEMISTRY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR AND METHOD OF PREPARING SAME
Publication number
20080063959
Publication date
Mar 13, 2008
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, AND IMAGE FORMING PROCESS, IMAG...
Publication number
20080020305
Publication date
Jan 24, 2008
Tetsuro Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, AND IMAGE FORMING APPARATUS AND...
Publication number
20070292780
Publication date
Dec 20, 2007
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTORECEPTOR, AND IMAGE FORMING APPARATUS AND...
Publication number
20070269729
Publication date
Nov 22, 2007
Hiroshi Ikuno
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, AND IMAGE FORMING PROCESS, IMAG...
Publication number
20070122724
Publication date
May 31, 2007
Tetsuro Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoreceptor, and image forming method, image...
Publication number
20060160003
Publication date
Jul 20, 2006
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Organic-inorganic hybrid material and method of preparing the organ...
Publication number
20060122303
Publication date
Jun 8, 2006
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoreceptor, and image forming method, image...
Publication number
20060078809
Publication date
Apr 13, 2006
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Photoconductor, producing method thereof, image forming process and...
Publication number
20060014093
Publication date
Jan 19, 2006
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoreceptor, and image forming method, appara...
Publication number
20050266328
Publication date
Dec 1, 2005
Yoshiki Yanagawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoconductor and image formation method, imag...
Publication number
20050221210
Publication date
Oct 6, 2005
Tetsuro Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoconductor, and image formation method, ima...
Publication number
20050158641
Publication date
Jul 21, 2005
Yoshiki Yanagawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoconductor, process for forming an image, i...
Publication number
20050112487
Publication date
May 26, 2005
Masayuki Shoshi
C07 - ORGANIC CHEMISTRY
Information
Patent Application
Electrophotographic photoconductor, and image forming process, imag...
Publication number
20040253527
Publication date
Dec 16, 2004
Tetsuro Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoconductor, and image forming process, imag...
Publication number
20040248024
Publication date
Dec 9, 2004
Tetsuro Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoconductor and method of preparing same
Publication number
20040053152
Publication date
Mar 18, 2004
Kazukiyo Nagai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoconductor, electrophotographic apparatus a...
Publication number
20040048177
Publication date
Mar 11, 2004
Nozomu Tamoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic photoconductor, process for forming an image, i...
Publication number
20030190540
Publication date
Oct 9, 2003
Masayuki Shoshi
C07 - ORGANIC CHEMISTRY
Information
Patent Application
Electrophotographic photoconductor, and process cartridge and elect...
Publication number
20030059695
Publication date
Mar 27, 2003
Hongguo Li
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY