John E. Johnston
13Patents
9h-index
23Co-inventors
68Inventor score
Filing activity: Dec 21, 1983 → Mar 27, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4804794A | Viscosity modifier polymers | Chemistry; Metallurgy | 73 | Expired |
| US4507515A | Lubricating oil compositions containing ethylene-alpha-olefin polymers of controlled sequence distribution and molecular heterogeneity | Chemistry; Metallurgy | 51 | Expired |
| US4749505A | Olefin polymer viscosity index improver additive useful in oil compositions | Chemistry; Metallurgy | 43 | Expired |
| US4900461A | Viscosity modifier polymers (E-98) | Chemistry; Metallurgy | 35 | Expired |
| US5035821A | End-capped multifunctional viscosity index improver | Chemistry; Metallurgy | 26 | Expired |
| US5167848A | Grafted viscosity index improver | Chemistry; Metallurgy | 20 | Expired |
| US5262075A | Multifunctional viscosity index improver exhibitng improved low temperature viscometric properties | Chemistry; Metallurgy | 13 | Expired |
| US6206940A | Fuel formulations to extend the lean limit (law770) | Chemistry; Metallurgy | 11 | Expired |
| US5053151A | Multifunctional viscosity index improver derived from amido-amine exhibiting improved low temperature viscometric properties | Chemistry; Metallurgy | 9 | Expired |
| US5356551A | Multifunctional viscosity index improver for lubricating oil compositions | Chemistry; Metallurgy | 7 | Expired |
| US5674822A | Synthetic ester base stocks for low emission lubricants | Chemistry; Metallurgy | 6 | Expired |
| US5252238A | Multifunctional viscosity index improver derived from amido-amine exhibiting improved low temperature viscometric properties | Chemistry; Metallurgy | 3 | Expired |
| US7052597B2 | Tuning fuel composition for driving cycle conditions in spark ignition engines | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.