Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855132 | Method of preparing bioerodible polymers having pH sensitivity in the acid range and resulting product | Jorge Heller, Steve Y. Ng | 1989-08-08 |
| 4801457 | Polyacetal hydrogels formed from divinyl ethers and polyols | Jorge Heller | 1989-01-31 |