Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4252938 | Acid agent from phenolic reactants aldehydes and aryl sulphonic acids and process for producing the same | Vasily D. Valgin, Alexandr M. Vasilenko, Dmitry V. Valgin | 1981-02-24 |