Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868247 | Chlorinated polyvinyl chloride blends having low melt viscosities | Paul P. Nicholas | 1989-09-19 |
| 4863635 | Method of treating the surface of polymers with a cuprous compound to form a copper sulfide composite structure | — | 1989-09-05 |
| 4847331 | Method and composition for improved melt processability of chlorinated polyvinyl chloride | — | 1989-07-11 |
| 4820750 | Pigmented vinyl chloride polymer or blend thereof having improved mechanical properties | John Standish | 1989-04-11 |