David A. Hutchison
12Patents
5h-index
10Co-inventors
63Inventor score
Filing activity: May 15, 1980 → Sep 14, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4948523A | Chlorine-free silver protective lubricant composition (I) | Chemistry; Metallurgy | 17 | Expired |
| US7863228B2 | Additives for lubricants and fuels | Chemistry; Metallurgy | 16 | Active |
| US4871465A | Chlorine-free silver protective lubricant composition (II) | Chemistry; Metallurgy | 16 | Expired |
| US7361629B2 | Additives for lubricants and fuels | Chemistry; Metallurgy | 12 | Expired |
| US5174915A | Medium speed diesel engine lubricating oils | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| USD314576S | Combined base and cover for an antenna | General | 5 | Expired |
| US4498998A | Stabilization of hydrocracked oils against UV-light degradation with certain dihydroxy components | Chemistry; Metallurgy | 2 | Expired |
| USD320604S | Cover for an antenna base | General | 2 | Expired |
| US4427563A | Stabilization of hydrocracked oils with certain dihydroxy diphenyl oxidation stabilizers | Chemistry; Metallurgy | 1 | Expired |
| US8623105B2 | Fuel additives to maintain optimum injector performance | Chemistry; Metallurgy | 1 | Active |
| US8377856B2 | Extended drain diesel lubricant formulations | Chemistry; Metallurgy | 1 | Active |
| US7833954B2 | Lubricating composition | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.