Inventor
HOFFEND THOMAS R
US48 patents
⚠️ This page may combine multiple inventors who share the name “HOFFEND THOMAS R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
XEROX CORP
46 patentsUS5227460AJul 13, 1993
Cross-linked toner resins
XEROX CORP267 citations99
US4560635ADec 24, 1985
Toner compositions with ammonium sulfate charge enhancing additives
XEROX CORP538 citations99
US5376494ADec 27, 1994
Reactive melt mixing process for preparing cross-linked toner resin
XEROX CORP111 citations98
US6042981AMar 28, 2000
Coated carrier
XEROX CORP57 citations96
US4883736ANov 28, 1989
Electrophotographic toner and developer compositions with polymeric alcohol waxes
XEROX CORP69 citations96
US4185140AJan 22, 1980
Polymeric release agents for electroscopic thermoplastic toners
XEROX CORP139 citations95
US4101686AJul 18, 1978
Method of fusing toner images using functionalized polymeric release agents
XEROX CORP118 citations95
US5548059AAug 20, 1996
Unsaturated polyesters
XEROX CORP39 citations93
US5393630AFeb 28, 1995
Melt mixing processes
XEROX CORP23 citations93
US4397935AAug 9, 1983
Positively charged developer compositions containing quaternized vinyl pyridine polymers
XEROX CORP32 citations93
US6251554B1Jun 26, 2001
Coated carrier
XEROX CORP18 citations92
US6010812AJan 4, 2000
Coated carrier
XEROX CORP20 citations92
US6004712ADec 21, 1999
Coated carrier
XEROX CORP44 citations92
US5945244AAug 31, 1999
Coated carrier
XEROX CORP19 citations92
US5935750AAug 10, 1999
Coated carrier
XEROX CORP21 citations92
US5352556AOct 4, 1994
Toners having cross-linked toner resins
XEROX CORP30 citations92
US4876169AOct 24, 1989
Toner compositions with release additives therein
XEROX CORP30 citations92
US5486444AJan 23, 1996
Polyester processes for the preparation of toner
XEROX CORP28 citations91
US4490455ADec 25, 1984
Amine acid salt charge enhancing toner additives
XEROX CORP44 citations91
US6355391B1Mar 12, 2002
Micro-powder coating for xerographic carrier
XEROX CORP45 citations89
US5407772AApr 18, 1995
Unsaturated polyesters
XEROX CORP17 citations82
US5401602AMar 28, 1995
Reactive melt mixing process for preparing cross-linked toner resins and toners therefrom
XEROX CORP18 citations82
US4752550AJun 21, 1988
Toner compositions with inner salt charge enhancing additives
XEROX CORP18 citations80
US6680153B2Jan 20, 2004
Toner compositions
XEROX CORP8 citations74
US6132917AOct 17, 2000
Coated carrier
XEROX CORP9 citations74
US6051353AApr 18, 2000
Coated carriers
XEROX CORP9 citations74
US5866290AFeb 2, 1999
Toner and developer compositions
XEROX CORP12 citations74
US5698422ADec 16, 1997
Toner and developer compositions
XEROX CORP8 citations74
US5532327AJul 2, 1996
Random copolymers made by anionic polymerization, toners incorporating these copolymers and method for the manufacture thereof
XEROX CORP15 citations74
US5397671AMar 14, 1995
Processes for preparing crosslinked resins and toner compositions therefrom
XEROX CORP15 citations74
US5166029ANov 24, 1992
Toner and developer compositions with charge enhancing additives
XEROX CORP7 citations74
US4600677AJul 15, 1986
Organoalkoxysilane carrier coatings
XEROX CORP14 citations74
US4330460AMay 18, 1982
Process for preparing colored toner particles employing a halogen salt to inhibit the aqueous phase polymerization
XEROX CORP12 citations74
US4314931AFeb 9, 1982
Toner pigment treatment process for reducing the residual styrene monomer concentration to less than 0.5 percent by weight
XEROX CORP11 citations74
US4170957AOct 16, 1979
Fixing device using polyarylsiloxanes as release agents
XEROX CORP8 citations74
US4065586ADec 27, 1977
Fixing method using polyarylsiloxanes as release agents
XEROX CORP9 citations74
US5082758AJan 21, 1992
Toner and developer compositions with charge enhancing additives
XEROX CORP11 citations73
US5066557ANov 19, 1991
Styrene butadiene copolymers as binders in mixed pigment generating layer
XEROX CORP6 citations73
US5518850AMay 21, 1996
Unsaturated polyesters with vinyl side chains
XEROX CORP8 citations72
US5079122AJan 7, 1992
Toner compositions with charge enhancing additives
XEROX CORP12 citations72
US6605404B2Aug 12, 2003
Coated Carriers
XEROX CORP5 citations63
US5151338ASep 29, 1992
Toner and developer compositions with charge enhancing additives
XEROX CORP3 citations63
US5194358AMar 16, 1993
Toner and developer compositions with charge enhancing additives
XEROX CORP3 citations62
US4837105AJun 6, 1989
Imaging process with prevention of toner spots
XEROX CORP2 citations61
US5318872AJun 7, 1994
Toner and developer compositions with fluorophosphate charge enhancing additives
XEROX CORP1 citations52
US5436103AJul 25, 1995
Modified unsaturated polyesters
XEROX CORP0 citations40