Inventor · disambiguated record
Donald R. Witt
Also filed as: WITT DONALD · WITT DONALD R
17 granted patents·1 pending application·546 citations·filing 1973–2022
95Inventor score
Top patents by PatentIndex Score
18 records- 0196US4405501AAging of chromium-containing gel at high pHPHILLIPS PETROLEUM CO·Filed 1982·Granted Sep 20, 1983·110 cites·25 claims
- 0296US4081407ACatalyst support prepared by alcohol treatment of hydrogelsPHILLIPS PETROLEUM CO·Filed 1976·Granted Mar 28, 1978·76 cites·5 claims
- 0393US4392990AHeating silica gel in inert atmosphere before activationPHILLIPS PETROLEUM CO·Filed 1982·Granted Jul 12, 1983·65 cites·24 claims
- 0493US3947433ASupported chromium oxide catalyst having mixed adjuvantPHILLIPS PETROLEUM CO·Filed 1974·Granted Mar 30, 1976·45 cites·18 claims
- 0587US4152503ACatalyst support prepared by alcohol treatment of hydrogelsPHILLIPS PETROLEUM CO·Filed 1977·Granted May 1, 1979·42 cites·12 claims
- 0683US4136061AContinuous, multiple zone fluidized bed for particle treaterPHILLIPS PETROLEUM CO·Filed 1977·Granted Jan 23, 1979·26 cites·14 claims
- 0783US3950316ACatalyst support formed by adding acidic material to silica containing titaniumPHILLIPS PETROLEUM CO·Filed 1974·Granted Apr 13, 1976·25 cites·20 claims
- 0880US5284811APolymerization catalysts and processesPHILLIPS PETROLEUM CO·Filed 1993·Granted Feb 8, 1994·28 cites·24 claims
- 0974US4246139ASilica productionPHILLIPS PETROLEUM CO·Filed 1975·Granted Jan 20, 1981·22 cites·3 claims
- 1074US3974101AOlefin polymerization catalystPHILLIPS PETROLEUM CO·Filed 1974·Granted Aug 10, 1976·16 cites·9 claims
- 1173US4436883APolymerization using a support formed by heating silica gel in inert atmospherePHILLIPS PETROLEUM CO·Filed 1982·Granted Mar 13, 1984·24 cites·25 claims
- 1269US4436882APolymerization process utilizing a catalyst prepared by aging of a chromium-containing gel at high pHPHILLIPS PETROLEUM CO·Filed 1982·Granted Mar 13, 1984·16 cites·28 claims
- 1368US5444132AControlled addition of alkali or alkaline earth salts to a chromium oxide catalystPHILLIPS PETROLEUM CO·Filed 1993·Granted Aug 22, 1995·15 cites·16 claims
- 1467US4001196AReactivation of organochromium olefin polymerization catalyst in presence of oxygenPHILLIPS PETROLEUM CO·Filed 1974·Granted Jan 4, 1977·11 cites·18 claims
- 1561US3948806ALarge pore silica and polymerization catalystPHILLIPS PETROLEUM CO·Filed 1973·Granted Apr 6, 1976·9 cites·4 claims
- 1661US2023148361A1On-chip integration of optical components with photonic wire bonds and/or lensesUNIV BRITISH COLUMBIA·Filed 2022·Application pending·0 cites
- 1758US5073531AOlefin polymerization catalysts and preparation methodPHILLIPS PETROLEUM CO·Filed 1990·Granted Dec 17, 1991·12 cites·23 claims
- 1837US4009327APolymerization of olefinsPHILLIPS PETROLEUM CO·Filed 1974·Granted Feb 22, 1977·4 cites·9 claims
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