Issued Patents All Time
Showing 25 most recent of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5130177 | Conductive coating compositions | Joseph Chow | 1992-07-14 |
| 4851316 | Liquid toner compositions with amino acids and polyvalent metal complexes as charge control additives | Joseph Chow | 1989-07-25 |
| RE32883 | Quarternary ammonium sulfate or sulfonate charge control agents for electrophotographic developers compatible with viton fuser | — | 1989-03-07 |
| 4654175 | Organic sulfate and sulfonate compositions | Seymour Baron | 1987-03-31 |
| 4647522 | Toner compositions containing certain cleaning additives | — | 1987-03-03 |
| 4480021 | Toner compositions containing negative charge enhancing additives | Christopher J. AuClair | 1984-10-30 |
| 4442189 | Toner compositions containing polyanhydride resins | Christopher J. AuClair | 1984-04-10 |
| 4411974 | Ortho-halo phenyl carboxylic acid charge enhancing additives | Christopher J. Au Clair, Peter F. Erhardt | 1983-10-25 |
| 4411975 | Para-halo phenyl carboxylic acid charge enhancing additives | Christopher J. Au Clair | 1983-10-25 |
| 4410617 | Colored toner and developer composition | Christopher J. AuClair | 1983-10-18 |
| 4397934 | Developer compositions containing quaternized vinylpyridine polymers, and copolymers | — | 1983-08-09 |
| 4391890 | Developer compositions containing alkyl pyridinium toluene sulfonates | — | 1983-07-05 |
| 4338390 | Quarternary ammonium sulfate or sulfonate charge control agents for electrophotographic developers compatible with viton fuser | — | 1982-07-06 |
| 4326019 | Positive toners containing long chain hydrazinium compounds | Peter F. Erhardt | 1982-04-20 |
| 4324851 | Positive color toners | Dominic F. Sherony, Peter F. Erhardt | 1982-04-13 |
| 4312933 | Method of imaging using nitrogen-containing additives for magnetic toners | — | 1982-01-26 |
| 4299903 | Emulsion polymerization process for dry positive toner compositions employs charge control agent as wetting agent | Christopher J. AuClair | 1981-11-10 |
| 4298672 | Toners containing alkyl pyridinium compounds and their hydrates | — | 1981-11-03 |
| 4293631 | Electrographic toner compositions | — | 1981-10-06 |
| 4291112 | Modification of pigment charge characteristics | — | 1981-09-22 |
| 4291111 | Nitrogen-containing additives for magnetic toners having hydrophobic and hydrophilic moiety | — | 1981-09-22 |
| 4287284 | Method of imagining using positive toners containing alkyl morpholinium compounds | Peter F. Erhardt | 1981-09-01 |
| 4286038 | Positive toners containing alkyl picolinium compounds | Peter F. Erhardt | 1981-08-25 |
| 4269922 | Positive toners containing long chain hydrazinium compounds | Peter F. Erhardt | 1981-05-26 |
| 4264702 | Positive toners containing alkyl morpholinium compounds as charge control agents | Peter F. Erhardt | 1981-04-28 |