Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879401 | Process for removal of impurities in alkyl nitrite formation | James R. Nelson | 1989-11-07 |
| 4827037 | Quality of catalytically prepared polyalkylene polyamines | — | 1989-05-02 |