Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7033720 | Development systems for magnetic toners and toners having reduced magnetic loadings | John F. Crichton, Robert D. Fields, Eric C. Stelter | 2006-04-25 |
| 6861192 | Crosslinked binder polymers for electrostatographic toners and toners formed therefrom | John C. Wilson, Paul L. Nielsen | 2005-03-01 |
| 6797448 | Electrophotographic toner and development process with improved image and fusing quality | Robert D. Fields, Thomas Foster, Paul L. Nielsen, Dinesh Tyagi | 2004-09-28 |
| 6766136 | Development systems for magnetic toners and toners having reduced magnetic loadings | John F. Crichton, Robert D. Fields, Eric C. Stelter | 2004-07-20 |
| 6610451 | Development systems for magnetic toners having reduced magnetic loadings | John F. Crichton, Robert D. Fields, Eric C. Stelter | 2003-08-26 |
| 6589703 | Electrographic methods using hard magnetic carrier particles | Eric C. Stelter, Robert D. Fields | 2003-07-08 |
| 5783346 | Toner compositions including polymer binders with adhesion promoting and charge control monomers | Dinesh Tyagi, Gary L. Burroway | 1998-07-21 |
| 5489975 | Image forming method and apparatus | Joseph Y. Kaukeinen, Peter S. Alexandrovich, Eric C. Stelter | 1996-02-06 |
| 5480757 | Two component electrophotographic developers and preparation method | Hans W. Osterhoudt, John M. Spence, Dinesh Tyagi | 1996-01-02 |
| 5409791 | Image forming method and apparatus | Joseph Y. Kaukeinen, Peter S. Alexandrovich, Eric C. Stelter | 1995-04-25 |
| 5364725 | Toner and developer containing acyloxy-t-alkylated benzoic acids as charge-control agent | John C. Wilson, Steven M. Bonser | 1994-11-15 |
| 5255057 | Gray scale monocomponent nonmagnetic development system | Eric C. Stelter, Joseph E. Guth, William B. Vreeland | 1993-10-19 |
| 5061586 | Glass composite magnetic carrier particles | Bijay S. Saha | 1991-10-29 |
| 4855396 | Polyesters containing covalently bound quaternary phosphonium salts | John C. Wilson | 1989-08-08 |
| 4837394 | electrostatographic toner particle comprising a polyester containing a covalently bound quaternary phosphonium salt | Peter S. Alexandrovich, Lawrence P. DeMejo, John C. Wilson | 1989-06-06 |
| 4546060 | Two-component, dry electrographic developer compositions containing hard magnetic carrier particles and method for using the same | Edward T. Miskinis | 1985-10-08 |
| 4517272 | Electrostatic dry toner composition | Donald S. Rimai | 1985-05-14 |
| 4496643 | Two-component dry electrostatic developer composition containing onium charge control agent | John C. Wilson, Lawrence P. DeMejo, Stewart H. Merrill | 1985-01-29 |
| 4394430 | Electrophotographic dry toner and developer compositions | Robert C. Storey | 1983-07-19 |
| RE31072 | Electrographic developing composition and process | Ravi Khanna, Stewart H. Merrill, Edmond S. Perry | 1982-11-02 |
| 4323634 | Electrographic toner and developer composition containing quaternary ammonium salt charge control agent | — | 1982-04-06 |