Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691077 | Shutdown, trilayer battery separator | — | 1997-11-25 |
| 5667911 | Methods of making cross-ply microporous membrane battery separator, and the battery separators made thereby | Carlton F. Dwiggins | 1997-09-16 |