Inventor · disambiguated record
Robert A. Keppel
Also filed as: KEPPEL ROBERT A
19 granted patents·381 citations·filing 1976–1999
95Inventor score
Top patents by PatentIndex Score
19 records- 0190US5168090AShaped oxidation catalyst structures for the production of maleic anhydrideMONSANTO CO·Filed 1991·Granted Dec 1, 1992·76 cites·18 claims
- 0283US4632915AIron/lithium--promoted catalysts for the production of maleic anhydrideMONSANTO CO·Filed 1985·Granted Dec 30, 1986·23 cites·5 claims
- 0381US6005121AHigh productivity process for the production of maleic anhydrideHUNTSMAN SPEC CHEM CORP·Filed 1998·Granted Dec 21, 1999·57 cites·44 claims
- 0481US5641722AHigh performance VPO catalyst and process of preparation thereofHUNTSMAN SPEC CHEM CORP·Filed 1994·Granted Jun 24, 1997·38 cites·35 claims
- 0573US4562268AProcess for producing maleic anhydrideMONSANTO CO·Filed 1983·Granted Dec 31, 1985·11 cites·29 claims
- 0672US4567158AProcess for preparing phosphorus-vanadium mixed oxide oxidation catalystsMONSANTO CO·Filed 1983·Granted Jan 28, 1986·24 cites·66 claims
- 0769US5929256AProduction of maleic anhydride using molybdenum-modified vanadium-phosphorus oxide catalystsHUNTSMAN SPEC CHEM CORP·Filed 1997·Granted Jul 27, 1999·29 cites·11 claims
- 0865US5945368AMolybdenum-modified vanadium-phosphorus oxide catalysts for the production of maleic anhydrideHUNTSMAN SPEC CHEM CORP·Filed 1995·Granted Aug 31, 1999·24 cites·108 claims
- 0963US6046343APrevention of catalyst attrition and tar formation in manufacture of maleic anhydrideHUNTSMAN SPEC CHEM CORP·Filed 1999·Granted Apr 4, 2000·23 cites·47 claims
- 1063US4409127AAttrition resistant metal/oxygen compositions and a process for their preparationMONSANTO CO·Filed 1981·Granted Oct 11, 1983·17 cites·41 claims
- 1161US5773382AHigh performance VPO catalyst and process of preparation thereofHUNTSMAN SPEC CHEM CORP·Filed 1997·Granted Jun 30, 1998·20 cites·11 claims
- 1255US4091019APreparation of unsaturated primary aminesMONSANTO CO·Filed 1976·Granted May 23, 1978·4 cites·8 claims
- 1353US4560674ACatalysts for the production of maleic anhydrideMONSANTO CO·Filed 1983·Granted Dec 24, 1985·4 cites·6 claims
- 1444US4670415AProcess for the preparation of iron/lithium -promoted catalysts for the production of maleic anhydrideMONSANTO CO·Filed 1985·Granted Jun 2, 1987·10 cites·15 claims
- 1541US5734066ASupression of autoignition in maleic anhydride productionHUNTSMAN SPEC CHEM CORP·Filed 1992·Granted Mar 31, 1998·2 cites·13 claims
- 1640US5877331APrevention of catalyst attrition and tar formation in manufacture of maleic anhydrideHUNTSMAN SPEC CHEM CORP·Filed 1997·Granted Mar 2, 1999·7 cites·24 claims
- 1739US4409133AAttrition resistant bismuth-containing metal/oxygen compositions and a process for their preparationMONSANTO CO·Filed 1981·Granted Oct 11, 1983·5 cites·29 claims
- 1837US4443642AAttrition resistant metal/oxygen compositionsMONSANTO CO·Filed 1983·Granted Apr 17, 1984·4 cites·27 claims
- 1934US4443641AAttrition resistant bismuth-containing metal/oxygen compositionsMONSANTO CO·Filed 1983·Granted Apr 17, 1984·3 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →