Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880720 | Liquid developer compositions | Stephan V. Drappel, Melvin D. Croucher | 1989-11-14 |
| 4830945 | Liquid electrophotographic developer comprising oppositely charged toner particles and dyes of different colors | Stephan V. Drappel, Melvin D. Croucher | 1989-05-16 |
| 4822710 | Liquid developer compositions | Melvin D. Croucher, James M. Duff, John R. C. Fuler, George R. Pravato | 1989-04-18 |
| 4816370 | Developer compositions with stabilizers to enable flocculation | Melvin D. Croucher, Michael L. Hair | 1989-03-28 |
| 4797342 | Processes for the preparation of liquid developers with low vapor pressure components | Melvin D. Croucher, Stephan V. Drappel | 1989-01-10 |