Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874567 | Microporous membranes from polypropylene | George Lopatin, Randall R. Rogers | 1989-10-17 |
| 4828772 | Microporous membranes of ultrahigh molecular weight polyethylene | George Lopatin | 1989-05-09 |