Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5155241 | Process for preparing styrene oxide | Keiichi Nishibe, Seiichi Rengakuji, Masami Inoue, Hirohisa Nitoh | 1992-10-13 |
| 5149871 | Water-soluble thiourea dioxide derivatives and process for preparing same | Hirohisa Nitoh, Morio Suzuki | 1992-09-22 |
| 5055286 | Process for preparing high purity hydrogen peroxide | Satoru Watanabe | 1991-10-08 |
| 5041569 | Process for preparing styrene oxide | Saburo Enomoto, Masami Inoue, Tutomu Kamiyama, Hirohisa Nitoh | 1991-08-20 |
| 4943661 | Process for preparing thiourea dioxide derivatives | Hirohisa Nitoh, Morio Suzuki | 1990-07-24 |
| 4382147 | Process for isolating 4,4-dihydroxydiphenyl sulfone from a mixture of dihydroxydiphenylsulfone isomers | Hirotsugu Kitamura, Yasumasa Shimizu | 1983-05-03 |
| 4238411 | Method of recovering thiourea dioxide | Osamu Fujimoto | 1980-12-09 |
| 4233238 | Process for preparing thiourea dioxide | Osamu Fujimoto | 1980-11-11 |