Inventor
SPIEWAK JOHN W
US56 patents
⚠️ This page may combine multiple inventors who share the name “SPIEWAK JOHN W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
XEROX CORP
45 patentsUS4921769AMay 1, 1990
Photoresponsive imaging members with polyurethane blocking layers
XEROX CORP243 citations99
US4806443AFeb 21, 1989
Polyarylamine compounds and systems utilizing polyarylamine compounds
XEROX CORP181 citations99
US4988597AJan 29, 1991
Conductive and blocking layers for electrophotographic imaging members
XEROX CORP142 citations98
US4801517AJan 31, 1989
Polyarylamine compounds and systems utilizing polyarylamine compounds
XEROX CORP131 citations98
US5244762ASep 14, 1993
Electrophotographic imaging member with blocking layer containing uncrosslinked chemically modified copolymer
XEROX CORP134 citations97
US5627002AMay 6, 1997
Liquid developer compositions with cyclodextrins
XEROX CORP50 citations96
US4806444AFeb 21, 1989
Arylamine polymers and systems utilizing arylamine polymers
XEROX CORP107 citations96
US5385796AJan 31, 1995
Electrophotographic imaging member having unmodified hydroxy methacrylate polymer charge blocking layer
XEROX CORP80 citations95
US5336577AAug 9, 1994
Single layer photoreceptor
XEROX CORP66 citations94
US5573882ANov 12, 1996
Liquid developer compositions with charge director block copolymers
XEROX CORP24 citations93
US5525449AJun 11, 1996
Liquid developer compositions with alcohol
XEROX CORP25 citations93
US5441841AAug 15, 1995
Liquid developer compositions with block copolymers
XEROX CORP37 citations93
US5397672AMar 14, 1995
Liquid developer compositions with block copolymers
XEROX CORP25 citations93
US5063125ANov 5, 1991
Electrically conductive layer for electrical devices
XEROX CORP38 citations93
US4935487AJun 19, 1990
Carbonate-arylamine polymer
XEROX CORP35 citations93
US6212347B1Apr 3, 2001
Imaging apparatuses and processes thereof containing a marking material with a charge acceptance additive of an aluminum complex
XEROX CORP25 citations92
US6187499B1Feb 13, 2001
Imaging apparatus
XEROX CORP20 citations92
US6180308B1Jan 30, 2001
Developer compositions and processes
XEROX CORP21 citations92
US6002893ADec 14, 1999
High and low pigment loadings for custom colors
XEROX CORP43 citations92
US5714297AFeb 3, 1998
Liquid developer compositions with rhodamine
XEROX CORP29 citations92
US5672456ASep 30, 1997
Liquid developer compositions
XEROX CORP23 citations92
US5459007AOct 17, 1995
Liquid developer compositions with block copolymers
XEROX CORP39 citations92
US5149609ASep 22, 1992
Polymers for photoreceptor overcoating for use as protective layer against liquid xerographic ink interaction
XEROX CORP27 citations92
US5063128ANov 5, 1991
Conductive and blocking layers for electrophotographic imaging members
XEROX CORP28 citations92
US4557868ADec 10, 1985
Process for preparing a phthalocyanine
XEROX CORP29 citations89
US6218066B1Apr 17, 2001
Developer compositions and processes
XEROX CORP14 citations74
US6187498B1Feb 13, 2001
Liquid developers and processes thereof
XEROX CORP11 citations74
US6060204AMay 9, 2000
Liquid developers and processes thereof
XEROX CORP5 citations74
US5942365AAug 24, 1999
Developer compositions and imaging processes
XEROX CORP13 citations74
US5866292AFeb 2, 1999
Liquid developer compositions with copolymers
XEROX CORP11 citations74
US5688624ANov 18, 1997
Liquid developer compositions with copolymers
XEROX CORP5 citations74
US5565297AOct 15, 1996
Liquid developer compositions with oxygen containing copolymers
XEROX CORP8 citations74
US5525450AJun 11, 1996
Liquid developer compositions with multiple block copolymers
XEROX CORP18 citations74
US5525448AJun 11, 1996
Liquid developer compositions with quaternized polyamines
XEROX CORP17 citations74
US5484679AJan 16, 1996
Liquid developer compositions with multiple block copolymers
XEROX CORP15 citations74
US5466551ANov 14, 1995
Image member including a grounding layer
XEROX CORP8 citations74
US5411834AMay 2, 1995
Liquid developer compositions with fluoroalkyl groups
XEROX CORP19 citations74
US5409796AApr 25, 1995
Liquid developer compositions with quaternized polyamines
XEROX CORP17 citations74
US5407775AApr 18, 1995
Liquid developer compositions with block copolymers
XEROX CORP12 citations74
US5028687AJul 2, 1991
Arylamine carbonate polymer
XEROX CORP16 citations74
US5783349AJul 21, 1998
Liquid developer compositions
XEROX CORP10 citations72
US7006780B2Feb 28, 2006
Partially fluorinated polymer coated development electrodes
XEROX CORP4 citations63
US5643707AJul 1, 1997
Liquid developer compositions
XEROX CORP3 citations63
US5554469ASep 10, 1996
Charging processes with liquid compositions
XEROX CORP5 citations63
US5476743ADec 19, 1995
Liquid developer compositions with organic additives
XEROX CORP5 citations63
FIRESTONE TIRE & RUBBER CO
3 patentsUS4338425AJul 6, 1982
Process for preparing diene-containing rubbers having improved green strength
FIRESTONE TIRE & RUBBER CO11 citations72
US4226972AOct 7, 1980
Process for preparing poly(organophosphazenes) from soluble or gelled poly(dichlorophosphazenes)
FIRESTONE TIRE & RUBBER CO4 citations63
US4035344AJul 12, 1977
Process for preparing ordered aromatic copolyamide urea polymer
FIRESTONE TIRE & RUBBER CO4 citations63
SYPULA DONALD S
1 patent(unassigned)
1 patentShowing the top 50 of 56 patents by PatentIndex Score.