Inventor · disambiguated record
Stephen J. Pietsch
Also filed as: PIETSCH STEPHEN · PIETSCH STEPHEN J
9 granted patents·1 pending application·152 citations·filing 1980–2017
88Inventor score
Files withSTANDARD OIL CO INDIANA5AMOCO CORP2BP CORP NORTH AMERICA INC1REDLEAF BIOLOGICS INC1SCRIPPS RESEARCH INST1
Top patents by PatentIndex Score
10 records- 0192US4298580ASeparation of cobalt and manganese from trimellitic acid process residue by precipitating as carbonates, redissolving as halides and removing cobalt by magnetic meansSTANDARD OIL CO INDIANA·Filed 1980·Granted Nov 3, 1981·45 cites·11 claims
- 0291US4933491AMethod for purifying a crude naphthalene dicarboxylic acidAMOCO CORP·Filed 1989·Granted Jun 12, 1990·37 cites·32 claims
- 0381US4748268AContinuous process for production of methacrylic acid ester of C1 to C4 aliphatic alcoholAMOCO CORP·Filed 1986·Granted May 31, 1988·20 cites·8 claims
- 0476US7070694B2Purification of fluid compounds utilizing a distillation - membrane separation processBP CORP NORTH AMERICA INC·Filed 2003·Granted Jul 4, 2006·24 cites·7 claims
- 0572US4298759ASeparation of cobalt and manganese from trimellitic acid process residue by extraction, ion exchanger and magnetSTANDARD OIL CO INDIANA·Filed 1980·Granted Nov 3, 1981·11 cites·4 claims
- 0653US2018055067A1Method for Producing Caramel Food ColoringREDLEAF BIOLOGICS INC·Filed 2017·Application pending·0 cites
- 0740US4311521AMembrane separation of catalyst metals from trimellitic acid production and separation of cobalt from manganeseSTANDARD OIL CO INDIANA·Filed 1980·Granted Jan 19, 1982·8 cites·6 claims
- 0839US10654790B2Recovery process for functionalized compound reaction productSCRIPPS RESEARCH INST·Filed 2015·Granted May 19, 2020·0 cites·19 claims
- 0939US4309390ASeparation of cobalt and manganese from trimellitic acid process residue by extraction, pH adjustment, and magnetSTANDARD OIL CO INDIANA·Filed 1980·Granted Jan 5, 1982·4 cites·3 claims
- 1037US4308240ARecovery of cobalt and manganese from ash of residue from manufacture of trimellitic acid by acid extractionSTANDARD OIL CO INDIANA·Filed 1980·Granted Dec 29, 1981·3 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →