Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4252938 | Acid agent from phenolic reactants aldehydes and aryl sulphonic acids and process for producing the same | Alexandr M. Vasilenko, Dmitry V. Valgin, Ljudmila A. Istratova | 1981-02-24 |
| 4211856 | Process for producing acid agent from sulfonated phenol and formaldehyde | Alexandr M. Vasilenko, Anatoly Y. Morozov, Vadim D. Chesnokov | 1980-07-08 |