Robert D. Fields
36Patents
8h-index
19Co-inventors
72Inventor score
Filing activity: Jul 8, 1985 → Dec 12, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4587154A | Oil and grease absorbent rinsable nonwoven fabric | Emerging Cross-Sectional Technologies | 76 | Expired |
| US4805644A | Sidestream reducing cigarette paper | Human Necessities | 67 | Expired |
| US5922822A | (2-(sulfonamidomethylene)-2-cyanoacetamido)phenyl acrylate polymers | Chemistry; Metallurgy | 32 | Expired |
| US6589703B2 | Electrographic methods using hard magnetic carrier particles | Physics | 19 | Expired |
| US5714295A | Electrostatographic toners and developers containing (1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)acetate charge-control agents | Physics | 13 | Expired |
| US6692880B2 | Electrophotographic toner with stable triboelectric properties | Physics | 11 | Expired |
| US6165668A | N-[2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2-cyanoacetyl]benzenesulfonamide charge control agents for electrostatographic toners and developers | Physics | 10 | Expired |
| US6610451B2 | Development systems for magnetic toners having reduced magnetic loadings | Physics | 8 | Expired |
| US5744277A | Electrostatographic toners and developers containing (1,2-benzisothiazol-3-(2H)-ylidene 1,1-dioxide) acetate-terminated polymer charge-control agents | Physics | 7 | Expired |
| US5739235A | (2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2-cyanoacetamido)phenyl acrylate compounds and polymers | Chemistry; Metallurgy | 6 | Expired |
| US6197466A | Electrophotographic toner surface treated with metal oxide | Physics | 6 | Expired |
| US6766136B2 | Development systems for magnetic toners and toners having reduced magnetic loadings | Physics | 5 | Expired |
| US6200722A | Method of making an electrophotographic toner surface treated with metal oxide | Physics | 5 | Expired |
| US5750715A | Bis(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)acetates! charge-control agents | Chemistry; Metallurgy | 4 | Expired |
| US5716749A | Bis2-1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2-cyanoacetamide! charge-control agents for electrostatographic toners | Physics | 4 | Expired |
| US5976753A | Electrostatographic toners and developers comprising poly[(2-cyanoacetamido)phenyl acrylate] charge-control agents | Physics | 4 | Expired |
| US7314696B2 | Electrophotographic toner and development process with improved charge to mass stability | Physics | 4 | Expired |
| US5719001A | (1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)methylene sulfone charge-control agents for electrostatographic toners | Physics | 4 | Expired |
| US5821025A | N-(1,2-benzisothiazol-3(2H)-ylideneacetyl 1,1-dioxide)amides for electrostatographic toners and developers | Physics | 4 | Expired |
| US5922499A | 2-(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide)-2- cyanoacetamides charge-control agents for electrostatographic toners and developers | Physics | 4 | Expired |
| US5874194A | PolyN-vinylbenzoyl)sulfonamides! charge-control agents for electrostatographic toners and developers | Physics | 4 | Expired |
| US5766815A | N-(1,2-benzisothiazol-3(2h)-ylideneacetyl 1,1-dioxide)-benzenesulfonamides charge-control agents for electrostatographic toners and developers | Physics | 3 | Expired |
| US6797448B2 | Electrophotographic toner and development process with improved image and fusing quality | Physics | 3 | Expired |
| US5849450A | (1,2-benzisothiazol-3-(2H)-ylidene 1,1-dioxide) acetate-terminated polymer charge-control agents for electrostatographic toners and developers | Chemistry; Metallurgy | 3 | Expired |
| US5719000A | Bis1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide cyanoacetates! for electrostatographic toners and developers | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.