John A. Schield
30Patents
6h-index
22Co-inventors
69Inventor score
Filing activity: Mar 11, 1982 → Aug 25, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5160642A | Polyimide quaternary salts as clay stabilization agents | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4757862A | Shale stabilizer and method of use thereof | Chemistry; Metallurgy | 18 | Expired |
| US6887447B2 | Hydrogen sulfide abatement in molten sulfur | Chemistry; Metallurgy | 9 | Expired |
| US6391070B2 | Anti-static additive compositions for hydrocarbon fuels | Chemistry; Metallurgy | 8 | Expired |
| US8366914B2 | Multifunctional scavenger for hydrocarbon fluids | Chemistry; Metallurgy | 8 | Active |
| US7601675B2 | Polyamine salts as clay stabilizing agents | Chemistry; Metallurgy | 6 | Active |
| US5672183A | Anti-static additives for hydrocarbons | Chemistry; Metallurgy | 5 | Expired |
| US4708993A | Cold flow improver and method of use thereof | Chemistry; Metallurgy | 5 | Expired |
| US7718586B2 | Hydrocarbons having reduced levels of mercaptans and method and composition useful for preparing same | Chemistry; Metallurgy | 4 | Expired |
| US7284610B2 | Polyamine salts as clay stabilizing agents | Chemistry; Metallurgy | 4 | Expired |
| US7867295B2 | Branched carboxylic acids as fuel lubricity additives | Chemistry; Metallurgy | 4 | Active |
| US5857287A | Methods and compositions for improvement of low temperature fluidity of fuel oils | Chemistry; Metallurgy | 4 | Expired |
| US7328745B2 | High molecular weight polyamine salts as clay stabilizing agents | Chemistry; Metallurgy | 3 | Active |
| US4617025A | Ester-containing halopolyalkylenes | Chemistry; Metallurgy | 3 | Expired |
| US9127226B2 | Process for clarifying biofuels | Chemistry; Metallurgy | 2 | Active |
| US4471098A | Ester-containing halopolyalkylenes | Chemistry; Metallurgy | 2 | Expired |
| US6656445B2 | Hydrogen sulfide abatement in molten sulfur | Chemistry; Metallurgy | 2 | Expired |
| US9719027B2 | Low viscosity metal-based hydrogen sulfide scavengers | Chemistry; Metallurgy | 1 | Active |
| US7838468B2 | High molecular weight polyamine salts as clay stabilizing agents | Chemistry; Metallurgy | 0 | Active |
| US4568359A | Ester-containing halopolyalkylenes | Chemistry; Metallurgy | 0 | Expired |
| US4541839A | Ester-containing halopolyalkylenes | Chemistry; Metallurgy | 0 | Expired |
| US4544712A | Ester-containing halopolyalkylenes | Chemistry; Metallurgy | 0 | Expired |
| US4536191A | Ester-containing halopolyalkylenes | Chemistry; Metallurgy | 0 | Expired |
| US4554327A | Ester-containing halopolyalkylenes | Chemistry; Metallurgy | 0 | Expired |
| US9725668B2 | Process for clarifying biofuels | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.