Inventor
FIELDS ROBERT D
US36 patents
⚠️ This page may combine multiple inventors who share the name “FIELDS ROBERT D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
EASTMAN KODAK CO
29 patentsUS6165668ADec 26, 2000
N-[2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2-cyanoacetyl]benzenesulfonamide charge control agents for electrostatographic toners and developers
EASTMAN KODAK CO21 citations93
US5922822AJul 13, 1999
(2-(sulfonamidomethylene)-2-cyanoacetamido)phenyl acrylate polymers
EASTMAN KODAK CO34 citations93
US5714295AFeb 3, 1998
Electrostatographic toners and developers containing (1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)acetate charge-control agents
EASTMAN KODAK CO22 citations93
US5976753ANov 2, 1999
Electrostatographic toners and developers comprising poly[(2-cyanoacetamido)phenyl acrylate] charge-control agents
EASTMAN KODAK CO8 citations74
US5874194AFeb 23, 1999
Poly N-vinylbenzoyl)sulfonamides! charge-control agents for electrostatographic toners and developers
EASTMAN KODAK CO14 citations74
US5849450ADec 15, 1998
(1,2-benzisothiazol-3-(2H)-ylidene 1,1-dioxide) acetate-terminated polymer charge-control agents for electrostatographic toners and developers
EASTMAN KODAK CO10 citations74
US5744277AApr 28, 1998
Electrostatographic toners and developers containing (1,2-benzisothiazol-3-(2H)-ylidene 1,1-dioxide) acetate-terminated polymer charge-control agents
EASTMAN KODAK CO7 citations74
US5739235AApr 14, 1998
(2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2-cyanoacetamido)phenyl acrylate compounds and polymers
EASTMAN KODAK CO9 citations74
US6797448B2Sep 28, 2004
Electrophotographic toner and development process with improved image and fusing quality
EASTMAN KODAK CO7 citations73
US6766136B2Jul 20, 2004
Development systems for magnetic toners and toners having reduced magnetic loadings
EASTMAN KODAK CO11 citations73
US6184387B1Feb 6, 2001
2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)acetamides negative charge control agents for electrostatographic toners and developers
EASTMAN KODAK CO5 citations72
US7314696B2Jan 1, 2008
Electrophotographic toner and development process with improved charge to mass stability
EASTMAN KODAK CO4 citations63
US7056637B2Jun 6, 2006
Electrophotographic toner with uniformly dispersed wax
EASTMAN KODAK CO3 citations63
US5922499AJul 13, 1999
2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2- cyanoacetamides charge-control agents for electrostatographic toners and developers
EASTMAN KODAK CO5 citations63
US5821025AOct 13, 1998
N-(1,2-benzisothiazol-3(2H)-ylideneacetyl 1,1-dioxide)amides for electrostatographic toners and developers
EASTMAN KODAK CO5 citations63
US5821024AOct 13, 1998
(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide) cyanomethylene charge-control agents for electrostatotographic toners and developers
EASTMAN KODAK CO3 citations63
US5804348ASep 8, 1998
Poly N-(acyl)-4-vinylbenzenesulfonamides! charge-control agents for electrostatographic toners and developers
EASTMAN KODAK CO3 citations63
US5766815AJun 16, 1998
N-(1,2-benzisothiazol-3(2h)-ylideneacetyl 1,1-dioxide)-benzenesulfonamides charge-control agents for electrostatographic toners and developers
EASTMAN KODAK CO4 citations63
US5750715AMay 12, 1998
Bis (1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)acetates! charge-control agents
EASTMAN KODAK CO5 citations63
US5750305AMay 12, 1998
Poly (2-(sulfonamidomethylene)-2-cyanoacetamido)phenyl acrylate! charge-control agents for electrostatographic toners and developers
EASTMAN KODAK CO2 citations63
US5723249AMar 3, 1998
(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide) cyanoacetate charge-control agents for electrostatographic toners
EASTMAN KODAK CO3 citations63
US5719000AFeb 17, 1998
Bis 1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide cyanoacetates! for electrostatographic toners and developers
EASTMAN KODAK CO4 citations63
US5719001AFeb 17, 1998
(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)methylene sulfone charge-control agents for electrostatographic toners
EASTMAN KODAK CO4 citations63
US5716749AFeb 10, 1998
Bis 2-1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2-cyanoacetamide! charge-control agents for electrostatographic toners
EASTMAN KODAK CO5 citations63
US6120964ASep 19, 2000
2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)acetamides negative charge control agents for electrostatographic toners and developers
EASTMAN KODAK CO3 citations61
US7087355B2Aug 8, 2006
Electrophotographic toner containing polyalkylene wax or high crystallinity wax
EASTMAN KODAK CO0 citations52
US7033720B2Apr 25, 2006
Development systems for magnetic toners and toners having reduced magnetic loadings
EASTMAN KODAK CO0 citations52
US5723248AMar 3, 1998
Electrostatographic toners and developers containing bis 1,2-benzisthiazol-3(2h) -ylidene 1,1-dioxide) acetates!charge-control agents
EASTMAN KODAK CO1 citations52
US7914963B2Mar 29, 2011
Toner composition
EASTMAN KODAK CO1 citations51
HEIDELBERGER DRUCKMASCH AG
3 patentsUS6610451B2Aug 26, 2003
Development systems for magnetic toners having reduced magnetic loadings
HEIDELBERGER DRUCKMASCH AG17 citations92
US6589703B2Jul 8, 2003
Electrographic methods using hard magnetic carrier particles
HEIDELBERGER DRUCKMASCH AG26 citations92
US6692880B2Feb 17, 2004
Electrophotographic toner with stable triboelectric properties
HEIDELBERGER DRUCKMASCH AG18 citations79