Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885382 | Method of producing tetrakis[3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxymethyl]methane | Masayoshi Gohbayashi, Noritsugu Narita | 1989-12-05 |
| 4883902 | Method of producing tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxymethyl]methane | Masayoshi Gohbayashi, Noritsugu Narita | 1989-11-28 |