Inventor · disambiguated record
John A. Schield
Also filed as: SCHIELD JOHN A
29 granted patents·2 pending applications·233 citations·filing 1982–2017
96Inventor score
Top patents by PatentIndex Score
31 records- 0191US5160642APolyimide quaternary salts as clay stabilization agentsPETROLITE CORP·Filed 1990·Granted Nov 3, 1992·72 cites·22 claims
- 0288US8366914B2Multifunctional scavenger for hydrocarbon fluidsBAKER HUGHES INC·Filed 2008·Granted Feb 5, 2013·8 cites·9 claims
- 0387US7601675B2Polyamine salts as clay stabilizing agentsBAKER HUGHES INC·Filed 2007·Granted Oct 13, 2009·11 cites·11 claims
- 0485US6391070B2Anti-static additive compositions for hydrocarbon fuelsBAKER HUGHES INC·Filed 2001·Granted May 21, 2002·20 cites·27 claims
- 0584US7867295B2Branched carboxylic acids as fuel lubricity additivesBAKER HUGHES INC·Filed 2007·Granted Jan 11, 2011·5 cites·18 claims
- 0682US7328745B2High molecular weight polyamine salts as clay stabilizing agentsBAKER HUGHES INC·Filed 2006·Granted Feb 12, 2008·7 cites·7 claims
- 0781US9127226B2Process for clarifying biofuelsO'BRIEN TIMOTHY J·Filed 2008·Granted Sep 8, 2015·3 cites·5 claims
- 0881US7284610B2Polyamine salts as clay stabilizing agentsBAKER HUGHES INC·Filed 2004·Granted Oct 23, 2007·8 cites·13 claims
- 0979US4757862AShale stabilizer and method of use thereofPETROLITE CORP·Filed 1986·Granted Jul 19, 1988·30 cites·2 claims
- 1077US9394396B2Hydrogen sulfide scavenger for use in hydrocarbonsSTARK JOSEPH L·Filed 2012·Granted Jul 19, 2016·4 cites·17 claims
- 1176US9719027B2Low viscosity metal-based hydrogen sulfide scavengersBAKER HUGHES INC·Filed 2014·Granted Aug 1, 2017·2 cites·4 claims
- 1276US6887447B2Hydrogen sulfide abatement in molten sulfurBAKER HUGHES INC·Filed 2003·Granted May 3, 2005·13 cites·10 claims
- 1367US7718586B2Hydrocarbons having reduced levels of mercaptans and method and composition useful for preparing sameBAKER HUGHES INC·Filed 2004·Granted May 18, 2010·5 cites·23 claims
- 1466US7838468B2High molecular weight polyamine salts as clay stabilizing agentsBAKER HUGHES INC·Filed 2008·Granted Nov 23, 2010·0 cites·10 claims
- 1563US5672183AAnti-static additives for hydrocarbonsPETROLITE CORP·Filed 1996·Granted Sep 30, 1997·19 cites·52 claims
- 1661US9725668B2Process for clarifying biofuelsBAKER HUGHES INC·Filed 2015·Granted Aug 8, 2017·0 cites·20 claims
- 1759US6656445B2Hydrogen sulfide abatement in molten sulfurBAKER HUGHES INC·Filed 2001·Granted Dec 2, 2003·3 cites·9 claims
- 1857US2017306246A1Low viscosity metal-based hydrogen sulfide scavengersBAKER HUGHES A GE CO LLC·Filed 2017·Application pending·0 cites
- 1953US5857287AMethods and compositions for improvement of low temperature fluidity of fuel oilsBAKER HUGHES INC·Filed 1997·Granted Jan 12, 1999·12 cites·21 claims
- 2045US4708993ACold flow improver and method of use thereofPETROLITE CORP·Filed 1986·Granted Nov 24, 1987·5 cites·15 claims
- 2141US2013239465A1Cold Flow Improvement of Distillate Fuels Using Alpha-Olefin CompositionsMORGAN BEN·Filed 2013·Application pending·0 cites
- 2238US4617025AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1985·Granted Oct 14, 1986·3 cites·1 claims
- 2335US4471098AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1982·Granted Sep 11, 1984·3 cites·8 claims
- 2430US4568359AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1985·Granted Feb 4, 1986·0 cites·8 claims
- 2530US4568726AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1985·Granted Feb 4, 1986·0 cites·9 claims
- 2630US4554327AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1985·Granted Nov 19, 1985·0 cites·2 claims
- 2730US4553980AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1985·Granted Nov 19, 1985·0 cites·1 claims
- 2830US4544712AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1985·Granted Oct 1, 1985·0 cites·9 claims
- 2930US4541839AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1984·Granted Sep 17, 1985·0 cites·8 claims
- 3030US4536551AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1984·Granted Aug 20, 1985·0 cites·13 claims
- 3130US4536191AEster-containing halopolyalkylenesPETROLITE CORP·Filed 1984·Granted Aug 20, 1985·0 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when John A. Schield files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →