Malcolm Waddoups
24Patents
13h-index
18Co-inventors
74Inventor score
Filing activity: May 11, 1987 → Jul 8, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6300291A | Lubricating oil composition | Chemistry; Metallurgy | 70 | Expired |
| US6723685B2 | Lubricating oil composition | Chemistry; Metallurgy | 68 | Expired |
| US6074993A | Lubricating oil composition containing two molybdenum additives | Chemistry; Metallurgy | 50 | Expired |
| US4938880A | Process for preparing stable oleaginous compositions | Chemistry; Metallurgy | 34 | Expired |
| US6333298A | Molybdenum-free low volatility lubricating oil composition | Chemistry; Metallurgy | 32 | Expired |
| US6004910A | Crankcase lubricant for modern heavy duty diesel and gasoline fueled engines | Chemistry; Metallurgy | 30 | Expired |
| US4863624A | Dispersant additives mixtures for oleaginous compositions | Chemistry; Metallurgy | 27 | Expired |
| US6127321A | Oil soluble dispersant additives useful in oleaginous compositions | Chemistry; Metallurgy | 19 | Expired |
| US4839073A | Polyolefinic succinimide polyamine alkyl acetoacetate and substituted acetate adducts as compatibilizer additives in lubricating oil compositions | Chemistry; Metallurgy | 17 | Expired |
| US5021173A | Friction modified oleaginous concentrates of improved stability | Chemistry; Metallurgy | 16 | Expired |
| US5049290A | Amine compatibility aids in lubricating oil compositions | Chemistry; Metallurgy | 16 | Expired |
| US6500786B1 | Lubricating oil composition | Chemistry; Metallurgy | 15 | Expired |
| US4915857A | Amine compatibility aids in lubricating oil compositions | Chemistry; Metallurgy | 15 | Expired |
| US5571950A | Method for testing soot-related viscosity increase | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US5451333A | Haze resistant dispersant-detergent compositions | Chemistry; Metallurgy | 10 | Expired |
| US6355074B1 | Oil soluble dispersant additives useful in oleaginous compositions | Chemistry; Metallurgy | 9 | Expired |
| US5118432A | Dispersant additive mixtures for oleaginous compositions | Chemistry; Metallurgy | 9 | Expired |
| US6051537A | Dispersant additive mixtures for oleaginous compositions | Chemistry; Metallurgy | 7 | Expired |
| US5013467A | Novel oleaginous composition additives for improved rust inhibition | Chemistry; Metallurgy | 7 | Expired |
| US5312554A | Process for preparing stable oleaginous compositions | Chemistry; Metallurgy | 7 | Expired |
| US6852679B2 | Lubricating oil composition | Chemistry; Metallurgy | 6 | Expired |
| US5043083A | Method for preparing salts of polyolefinic substituted dicarboxylic acids in oleaginous mixtures of reduced viscosity | Chemistry; Metallurgy | 5 | Expired |
| US6642188B1 | Lubricating oil composition for outboard engines | Chemistry; Metallurgy | 5 | Expired |
| US5439604A | Oil soluble additives useful in oleaginous compositions | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.