Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4729843 | Mixtures of alkyl xanthogen formates and dialkyl thionocarbamates as collectors in froth flotation | — | 1988-03-08 |
| 4699712 | Ore dressing method | — | 1987-10-13 |
| 4689142 | Alkyl mercaptans as collector additives in froth flotation | — | 1987-08-25 |
| 4584095 | Ore flotation method employing phosphorodithio compounds as frother adjuvants | — | 1986-04-22 |
| 4530758 | Ore flotation method | Rory L. Tibbals | 1985-07-23 |
| 4507198 | Flotation collectors and methods | Rory L. Tibbals, Dennis V. Smeltzer | 1985-03-26 |
| 4387034 | Mixed alkylthionocarbamates flotation collectors and ore dressing methods in which the collectors are employed | Dennis V. Smeltzer | 1983-06-07 |