Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4248760 | Method of obtaining composite materials and products, particularly for construction and building purposes, based on urea-formaldehyde resins by addition of phosphogypsum | Valeri M. Cheshkov, Georgi Z. Zahariev | 1981-02-03 |
| 4212681 | Method of accelerating the hardening and increasing the strength of Portland cement | Nikola B. Djabarov | 1980-07-15 |
| 4205998 | Admixture for obtaining rapid hardening portland cement and a method by which it is to be performed | Mikola B. Djabarov | 1980-06-03 |