Clarence D. Vanderpool
55Patents
10h-index
25Co-inventors
78Inventor score
Filing activity: Oct 23, 1973 → Jul 20, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4624703A | Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4338126A | Recovery of tungsten from heavy metal alloys | Chemistry; Metallurgy | 26 | Expired |
| US4348224A | Method for producing cobalt metal powder | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4808384A | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4718996A | Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4626280A | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4278463A | Process for recovering cobalt | Chemistry; Metallurgy | 16 | Expired |
| US4668483A | Process for recovery of chromium | Chemistry; Metallurgy | 14 | Expired |
| US4469505A | Method for producing cobalt metal powder | Performing Operations; Transporting | 14 | Expired |
| US4214895A | Method for producing cobalt metal powder | Chemistry; Metallurgy | 13 | Expired |
| US4718995A | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4395278A | Method for producing cobalt metal powder | Chemistry; Metallurgy | 10 | Expired |
| US4804407A | Method for recovering cobalt from hexammine cobaltic (111) solutions | Chemistry; Metallurgy | 9 | Expired |
| US4208461A | Coated phosphors and articles employing same | Emerging Cross-Sectional Technologies | 9 | Expired |
| US3936362A | Process for the manufacture of ammonium tungstate ammonium paratungstate, ammonium metatungstate and hydrated tungsten trioxide | Chemistry; Metallurgy | 9 | Expired |
| US3947332A | Preparation of heteropoly acids of tungsten and molybdenum | Chemistry; Metallurgy | 8 | Expired |
| US4184868A | Method for producing extra fine cobalt metal powder | Chemistry; Metallurgy | 8 | Expired |
| US4381937A | Method for producing cobalt metal powder | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4452633A | Method for producing cobalt metal powder | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4409019A | Method for producing cobalt metal powder | Performing Operations; Transporting | 5 | Expired |
| US4612039A | Production of pure cobalt metal powder | Chemistry; Metallurgy | 5 | Expired |
| US4454098A | Process for reclaiming tungsten from a hazardous waste | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5417945A | Process for recovering tungsten as an ammoniacal tungstate compound in which ammoniacal tungstate liquors are reclaimed | Chemistry; Metallurgy | 4 | Expired |
| US4397690A | Process for recovering gold | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4199617A | Coated phosphors and articles employing same | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.