Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853158 | Process for preparing N,N-dialkylaniline salt of 5-acetyl-2-alkylbenzene sulfonic acid | Masao Kawamura, Hiroshi Goda, Kiyoshi Sawada, Kazuhiro Hamatani | 1989-08-01 |
| 4849138 | Method of producing alkali metal benzenesulfinates | Akira Onoe, Masao Kawamura, Masato Yoshikawa, Hirokazu Kagano | 1989-07-18 |
| 4835317 | 4-tert.-butyl-1,2-benzenedithiol, complex compounds derived therefrom, and a method of producing the same | Michio Suzuki, Masao Kawamura, Masahide Takahashi, Tsuyoshi Morishita, Kazuyuki Nakayama +1 more | 1989-05-30 |