Inventor · disambiguated record
Clarence D. Vanderpool
Also filed as: FEDORCHAK MARY A · RITSKO JOSEPH E · VANDERPOOL CLARENCE D
55 granted patents·1 pending application·546 citations·filing 1973–2001
98Inventor score
Top patents by PatentIndex Score
56 records- 0192US4624703ARecovery of tungsten, scandium, iron, and manganese values from tungsten bearing materialGTE PROD CORP·Filed 1986·Granted Nov 25, 1986·42 cites·9 claims
- 0292US4338126ARecovery of tungsten from heavy metal alloysGTE PROD CORP·Filed 1980·Granted Jul 6, 1982·36 cites·3 claims
- 0390US4808384ARecovery of tungsten, scandium, iron, and manganese from tungsten bearing materialGTE PROD CORP·Filed 1987·Granted Feb 28, 1989·38 cites·20 claims
- 0487US4668483AProcess for recovery of chromiumGTE PROD CORP·Filed 1986·Granted May 26, 1987·32 cites·9 claims
- 0586US4348224AMethod for producing cobalt metal powderGTE PROD CORP·Filed 1981·Granted Sep 7, 1982·25 cites·7 claims
- 0683US4718996ARecovery of tungsten, scandium, iron, and manganese values from tungsten bearing materialGTE PROD CORP·Filed 1986·Granted Jan 12, 1988·31 cites·10 claims
- 0782US3947332APreparation of heteropoly acids of tungsten and molybdenumGTE SYLVANIA INC·Filed 1974·Granted Mar 30, 1976·21 cites·5 claims
- 0881US4469505AMethod for producing cobalt metal powderGTE PROD CORP·Filed 1980·Granted Sep 4, 1984·22 cites·9 claims
- 0979US4626280ARecovery of tungsten, scandium, iron, and manganese from tungsten bearing materialGTE PROD CORP·Filed 1986·Granted Dec 2, 1986·23 cites·7 claims
- 1076US4278463AProcess for recovering cobaltGTE PROD CORP·Filed 1980·Granted Jul 14, 1981·17 cites·4 claims
- 1176US4214895AMethod for producing cobalt metal powderGTE SYLVANIA INC·Filed 1979·Granted Jul 29, 1980·16 cites·14 claims
- 1272US4385972AElectrolytic disintegration of sintered metal carbidesGTE PROD CORP·Filed 1981·Granted May 31, 1983·16 cites·4 claims
- 1372US3936362AProcess for the manufacture of ammonium tungstate ammonium paratungstate, ammonium metatungstate and hydrated tungsten trioxideGTE SYLVANIA INC·Filed 1974·Granted Feb 3, 1976·13 cites·8 claims
- 1470US4718995ARecovery of tungsten, scandium, iron, and manganese from tungsten bearing materialGTE PROD CORP·Filed 1986·Granted Jan 12, 1988·16 cites·11 claims
- 1567US4184868AMethod for producing extra fine cobalt metal powderGTE SYLVANIA INC·Filed 1979·Granted Jan 22, 1980·12 cites·8 claims
- 1662US4395278AMethod for producing cobalt metal powderGTE PROD CORP·Filed 1980·Granted Jul 26, 1983·12 cites·11 claims
- 1760US4612180AMethod of producing crystalline ammonium metatungstateGTE PROD CORP·Filed 1985·Granted Sep 16, 1986·10 cites·6 claims
- 1859US4381937AMethod for producing cobalt metal powderGTE PROD CORP·Filed 1981·Granted May 3, 1983·8 cites·3 claims
- 1955US4804407AMethod for recovering cobalt from hexammine cobaltic (111) solutionsGTE PROD CORP·Filed 1988·Granted Feb 14, 1989·9 cites·1 claims
- 2054US4454098AProcess for reclaiming tungsten from a hazardous wasteGTE PROD CORP·Filed 1983·Granted Jun 12, 1984·8 cites·6 claims
- 2153US5417945AProcess for recovering tungsten as an ammoniacal tungstate compound in which ammoniacal tungstate liquors are reclaimedGTE PROD CORP·Filed 1991·Granted May 23, 1995·9 cites·2 claims
- 2253US4612039AProduction of pure cobalt metal powderGTE PROD CORP·Filed 1985·Granted Sep 16, 1986·7 cites·5 claims
- 2352US6395196B1Process for producing electroluminescent phosphor with extended half-lifeOSRAM SYLVANIA INC·Filed 2000·Granted May 28, 2002·2 cites·5 claims
- 2452US4623534AMethod for producing ammonium paratungstateGTE PROD CORP·Filed 1985·Granted Nov 18, 1986·7 cites·6 claims
- 2552US4208461ACoated phosphors and articles employing sameGTE SERVICE CORP·Filed 1978·Granted Jun 17, 1980·10 cites·9 claims
- 2651US4452633AMethod for producing cobalt metal powderGTE PROD CORP·Filed 1983·Granted Jun 5, 1984·8 cites·1 claims
- 2750US4397690AProcess for recovering goldGTE PROD CORP·Filed 1982·Granted Aug 9, 1983·7 cites·8 claims
- 2849US4594230ARecovery of cobaltGTE PROD CORP·Filed 1985·Granted Jun 10, 1986·6 cites·7 claims
- 2948US3947555AProcess for the reclamation of uncemented tungsten carbide powdersGTE SYLVANIA INC·Filed 1973·Granted Mar 30, 1976·6 cites·4 claims
- 3046US4624844AProcess for producing ammonium paratungstateGTE PROD CORP·Filed 1985·Granted Nov 25, 1986·5 cites·7 claims
- 3145US4409019AMethod for producing cobalt metal powderGTE PROD CORP·Filed 1982·Granted Oct 11, 1983·5 cites·7 claims
- 3244US5021133AElectrolytic method for producing ammonium paratungstate from cemented tungsten carbideGTE PROD CORP·Filed 1990·Granted Jun 4, 1991·6 cites·3 claims
- 3344US4608084ARecovery of cobalt and chromiumGTE PROD CORP·Filed 1985·Granted Aug 26, 1986·5 cites·6 claims
- 3444US4199617ACoated phosphors and articles employing sameGTE SYLVANIA INC·Filed 1978·Granted Apr 22, 1980·7 cites·2 claims
- 3542US4626425ARecovery of tungsten from ammoniacal solutionsGTE PROD CORP·Filed 1985·Granted Dec 2, 1986·4 cites·4 claims
- 3641US6623807B2Stabilization of color in heated electroluminescent phosphorOSRAM SYLVANIA INC·Filed 2001·Granted Sep 23, 2003·0 cites·6 claims
- 3741US4741886AProcess for recovering tungsten from tungsten bearing material containing arsenicGTE PROD CORP·Filed 1986·Granted May 3, 1988·4 cites·6 claims
- 3841US4690710AProcess for producing cobalt metal powderGTE PROD CORP·Filed 1985·Granted Sep 1, 1987·4 cites·7 claims
- 3941US4608235ARecovery of cobaltGTE PROD CORP·Filed 1985·Granted Aug 26, 1986·4 cites·4 claims
- 4040US4283257AProcess for preparing ammonium metatungstateGTE PROD CORP·Filed 1980·Granted Aug 11, 1981·4 cites·9 claims
- 4140US4283258ARecovery of tungsten from heavy metal alloysGTE PROD CORP·Filed 1980·Granted Aug 11, 1981·4 cites·3 claims
- 4237US4175160ACoated phosphors and articles employing sameGTE SYLVANIA INC·Filed 1978·Granted Nov 20, 1979·4 cites·10 claims
- 4337US2002117767A1Encapsulated phosphor with reduced surface areaFiled 2001·Application pending·0 cites
- 4436US5015458AMethod for purifying sulfuric acid solutionsGTE PROD CORP·Filed 1990·Granted May 14, 1991·5 cites·2 claims
- 4535US4961910ARecovery of tungsten and molybdenumGTE PROD CORP·Filed 1987·Granted Oct 9, 1990·2 cites·12 claims
- 4633US6113808AElectroluminescent phosphor with extended life and method of making sameOSRAM SYLVANIA INC·Filed 1998·Granted Sep 5, 2000·1 cites·3 claims
- 4733US4816069AMethod for converting cobalt to cobalt metal powderGTE PROD CORP·Filed 1988·Granted Mar 28, 1989·4 cites·10 claims
- 4833US4599224ARecovery of molybdenum from molybdenum disulfideGTE PROD CORP·Filed 1985·Granted Jul 8, 1986·2 cites·9 claims
- 4932US4605538AProduction of pure molybdenumGTE PROD CORP·Filed 1985·Granted Aug 12, 1986·1 cites·4 claims
- 5031US5009788AMethod for removing organic and tungsten from sodium sulfate solutionGTE PROD CORP·Filed 1990·Granted Apr 23, 1991·0 cites·1 claims
Showing the top 50 of 56 patent records by PatentIndex Score.
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