Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884960 | Die for extruding and wash coating | — | 1989-12-05 |
| 4846657 | Die for extruding ultrafine honeycomb structures | — | 1989-07-11 |
| 4812276 | Stepwise formation of channel walls in honeycomb structures | — | 1989-03-14 |
| 4795845 | Regeneration of dehydrocyclodimerization catalyst | David C. Martindale, Joseph A. Kocal | 1989-01-03 |