Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5376617 | Crystal modification of 2-(3-methylanilion)-3-methyl-6-diethylamino-fluoran, process for the preparation thereof, and recording materials containing said crystal modification | Yojiro Kumagae, Shigeo Fujita, Mansuke Matsumoto, Shuuichi Hashimoto | 1994-12-27 |
| 5342967 | Crystal modifications of 2-M-toluidino-3-methyl-6-di-N-butylaminofluoran, process for preparing thereof, and recording materials containing said crystal modifications | Shigeo Fujita, Mansuke Matsumoto, Yojiro Kumagae, Shuichi Hashimoto | 1994-08-30 |
| 5338866 | Crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran, process for the preparation thereof, and recording materials containing said crystal modification | Yojiro Kumagae, Shigeo Fujita, Mansuke Matsumoto, Shuuichi Hashimoto | 1994-08-16 |