Inventor · disambiguated record
William K. Stephenson
Also filed as: STEPHENSON WILLIAM K
9 granted patents·283 citations·filing 1989–2005
91Inventor score
Top patents by PatentIndex Score
9 records- 0192US5021498AAsphaltene dispersants - inhibitorsNALCO CHEMICAL CO·Filed 1989·Granted Jun 4, 1991·65 cites·10 claims
- 0288US7431845B2Method of clarifying oily waste waterNALCO CO·Filed 2005·Granted Oct 7, 2008·20 cites·17 claims
- 0387US5143594ARefinery anti-foulant - asphaltene dispersantNALCO CHEMICAL CO·Filed 1991·Granted Sep 1, 1992·62 cites·3 claims
- 0476US6120678ADesalting adjunct chemistryNALCO EXXON ENERGY CHEM LP·Filed 1993·Granted Sep 19, 2000·52 cites·8 claims
- 0571US4968449AAlkoxylated vinyl polymer demulsifiersNALCO CHEMICAL CO·Filed 1989·Granted Nov 6, 1990·26 cites·9 claims
- 0666US5073248AAsphaltene dispersants - inhibitorsNALCO CHEMICAL CO·Filed 1991·Granted Dec 17, 1991·19 cites·8 claims
- 0765US5100531ARefinery anti-foulant - asphaltene dispersantNALCO CHEMICAL CO·Filed 1991·Granted Mar 31, 1992·20 cites·6 claims
- 0844US5196486AAlkoxylated vinyl polymer demulsifiersNALCO CHEMICAL CO·Filed 1990·Granted Mar 23, 1993·12 cites·7 claims
- 0939US5028239AFuel dewatering additivesNALCO CHEMICAL CO·Filed 1989·Granted Jul 2, 1991·7 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →