Roger M. Sheets
21Patents
4h-index
24Co-inventors
59Inventor score
Filing activity: Feb 2, 2001 → Nov 8, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7214649B2 | Hydrocarbyl dispersants including pendant polar functional groups | Chemistry; Metallurgy | 48 | Expired |
| US6800103B2 | Secondary amine mannich detergents | Chemistry; Metallurgy | 15 | Expired |
| US6844300B2 | Low phosphorus clean gear formulations | Chemistry; Metallurgy | 8 | Expired |
| US7368596B2 | Process for producing zinc dialkyldithiophosphates exhibiting improved seal compatibility properties | Chemistry; Metallurgy | 5 | Expired |
| US7879775B2 | Lubricant compositions | Chemistry; Metallurgy | 3 | Active |
| US8349778B2 | Lubricating compositions having improved friction properties | Chemistry; Metallurgy | 2 | Active |
| US8299003B2 | Composition comprising a sulfur-containing, phosphorus-containing compound, and/or its salt, and uses thereof | Chemistry; Metallurgy | 1 | Active |
| US8211840B2 | Additives and lubricant formulations for improved antiwear properties | Chemistry; Metallurgy | 1 | Active |
| US8198221B2 | Engine wear protection in engines operated using ethanol-based fuel | Chemistry; Metallurgy | 0 | Active |
| US7888299B2 | Extended drain, thermally stable, gear oil formulations | Chemistry; Metallurgy | 0 | Active |
| US7928260B2 | Salt of a sulfur-containing, phosphorus-containing compound, and methods thereof | Chemistry; Metallurgy | 0 | Active |
| US7737094B2 | Engine wear protection in engines operated using ethanol-based fuel | Chemistry; Metallurgy | 0 | Active |
| US8466096B2 | 1,3,2-dioxaphosphorinane, 2-sulfide derivatives for use as anti-wear additives in lubricant compositions | Chemistry; Metallurgy | 0 | Active |
| US7592490B2 | Process for producing zinc dialkyldithiophosphates exhibiting improved seal compatibility properties | Chemistry; Metallurgy | 0 | Active |
| US8618030B2 | 1,3,2-dioxaphosphorinane, 2-sulfide derivatives for use as anti-wear additives in lubricant compositions | Chemistry; Metallurgy | 0 | Active |
| US8853422B2 | Pyrrolidine-2,5-dione derivatives for use in friction modification | Chemistry; Metallurgy | 0 | Active |
| US7208452B2 | Process for manufacturing alkylphosphonate monoesters | Chemistry; Metallurgy | 0 | Expired |
| US8624038B2 | Pyrrolidine-2,5-dione derivatives for use in friction modification | Chemistry; Metallurgy | 0 | Active |
| US8871696B2 | 1,3,2-dioxaphosphorinane, 2-sulfide derivatives for use as anti-wear additives in lubricant compositions | Chemistry; Metallurgy | 0 | Active |
| US8709985B2 | Lubricant composition | Chemistry; Metallurgy | 0 | Active |
| US8877956B2 | 1,3,2-dioxaphosphorinane, 2-sulfide derivatives for use as anti-wear additives in lubricant compositions | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.