Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342813 | Catalyst for polymerizing aromatic vinyl compound and process for producing polymer of aromatic vinyl compound | — | 1994-08-30 |
| 5320784 | Crystal comprising an indolinospirobenzothiopyran derivative and its ring opened isomer | — | 1994-06-14 |
| 5288592 | Transition metal-spirobenzopyran complex, a production process therefor and a photochromic material comprising the complex | — | 1994-02-22 |