Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4806689 | Zeolite Rho as catalyst for conversion of methanol and ammonia to dimethylamine | Thurman E. Gier, Robert D. Shannon, George C. Sonnichsen, David Richard Corbin | 1989-02-21 |