Issued Patents All Time
Showing 51–60 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5229003 | Recovery of base materials from geothermal brines | — | 1993-07-20 |
| 5178848 | Lithium metatungstate | Houyuan Liu, Nicholas L. Labao, Purusotam L. Shrestha | 1993-01-12 |
| 5176802 | Treatment of copper sulfide concentrates | Robert N. Hickman | 1993-01-05 |
| 4614543 | Mixed lixiviant for separate recovery of zinc and lead from iron-containing waste materials | Mahesh C. Jha | 1986-09-30 |
| 4610722 | Process for metal recovery from steel plant dust | Robert F. Hogsett | 1986-09-09 |
| 4610721 | Two-stage leaching process for steel plant dusts | Mahesh C. Jha | 1986-09-09 |
| 4605435 | Recycling of steel plant dusts to steel furnaces | — | 1986-08-12 |
| 4572771 | Zinc recovery from steel plant dusts and other zinciferous materials | Mahesh C. Jha | 1986-02-25 |
| 4552629 | Electrogalvanizing utilizing primary and secondary zinc sources | Robert F. Hogsett | 1985-11-12 |
| 4195065 | Leaching nickeliferous oxide ores | — | 1980-03-25 |