Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888139 | Process for preparing CHF20CHFCF3 and CHF20CHC1CF3 and novel intermediate compounds employed therein | Donald F. Halpern | 1989-12-19 |
| 4874901 | Process for the production of polyfluorinated ethers | Donald F. Halpern | 1989-10-17 |
| 4855511 | Process for preparing CHF.sub.2 OCHFCF.sub.3 and CHF.sub.2 OCHClCF.sub.3 and novel intermediate compounds employed therein | Donald F. Halpern | 1989-08-08 |