Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4504271 | Leather tanning agent and process for making same | Ljudmila P. Tjurkina, Maria M. Godneva, Nina I. Kolesnikova, Galina G. Yakusheva, Metelkin A. Ivanovich, deceased +1 more | 1985-03-12 |
| 4396387 | Method for preparing titanium tanning agent and use thereof in leather tanning process | Ljudmila P. Tjurkina, Lidia G. Gerasimova, Alexandr I. Metelkin, Isaak G. Shifrin, Nina I. Kolesnikova +6 more | 1983-08-02 |
| 4314975 | Method for preparing titanium tanning agent | Ljudmila P. Tjurkina, Lidia G. Gerasimova, Alexandr I. Metelkin, Isaak G. Shifrin, Nina I. Kolesnikova +6 more | 1982-02-09 |