Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840864 | New electrostatographic toners and developers containing new charge-control agents | Douglas E. Bugner, Peter S. Alexandrovich, Lawrence P. DeMejo, Robert A. Guistina | 1989-06-20 |
| 4837391 | Dry electrostatographic developer containing toner particles comprising a vinyl addition polymer containing a covalently bound quaternary phosphonium salt | Douglas E. Bugner | 1989-06-06 |
| 4837392 | Dry electrostatographic developer containing toner particles comprising a vinyl addition polymer containing a covalently bound quaternary phosphonium salt | Douglas E. Bugner, Lawrence P. DeMejo, Richard C. Sutton, John C. Wilson | 1989-06-06 |
| 4834920 | New quaternary ammonium salts | Douglas E. Bugner, Peter S. Alexandrovich, Lawrence P. DeMejo, Robert A. Guistina | 1989-05-30 |
| 4812378 | Electrostatographic toners and developers containing charge-control agents | Douglas E. Bugner, Peter S. Alexandrovich, Lawrence P. DeMejo, Robert A. Guistina | 1989-03-14 |
| 4806284 | New quaternary ammonium salts | Douglas E. Bugner, Peter S. Alexandrovich, Lawrence P. De Mejo, Robert A. Guistina | 1989-02-21 |