Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5759512 | Regeneration of dithiophosphorus acid metal extractants | Indje Ognianov Mihaylov, Bruce Love, Pak Kuen Louie, Eberhard Krause | 1998-06-02 |
| 5344567 | Recovery of indium by solvent extraction using trialkylphosphine oxides | — | 1994-09-06 |
| 5028334 | Selective recovery of tin by solvent extraction using branched tertiary phosphine oxides | Richard John Boyle | 1991-07-02 |
| 5028403 | Metal recovery with monothiophosphinic acids | Allan J. Robertson | 1991-07-02 |
| 4909939 | Process for solvent extraction using phosphine oxide mixtures | Allan J. Robertson | 1990-03-20 |
| 4778663 | Uranium recovery from wet process phosphoric acid unsymmetrical phosphine oxides | — | 1988-10-18 |
| 4721605 | Selective removal of metals from aqueous solutions with dithiophosphinic acids | Timothy James Brown, Richard John Boyle | 1988-01-26 |
| 4623522 | Extraction of silver and palladium metals from aqueous solutions using tertiary phosphine sulfides | — | 1986-11-18 |
| 4619816 | Recovery of cobalt from ammoniacal solutions containing cobalt and nickel | — | 1986-10-28 |
| 4382016 | Extractant for the selective removal of cobalt(II) from aqueous solutions | Allan J. Robertson, David R. Burley | 1983-05-03 |
| 4353883 | Selective extraction of cobalt(II) from aqueous solutions with phosphinic acid extractants | Allan J. Robertson, David R. Burley | 1982-10-12 |
| 4348367 | Selective removal of cobalt(II) from aqueous solutions with phosphinic extractants | Allan J. Robertson, David R. Burley | 1982-09-07 |