Jack L. Karn
26Patents
13h-index
19Co-inventors
78Inventor score
Filing activity: May 2, 1973 → Apr 17, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5484542A | Sulfurized overbased compositions | Mechanical Engineering; Lighting; Heating | 53 | Expired |
| US4266945A | Molybdenum-containing compositions and lubricants and fuels containing them | Chemistry; Metallurgy | 51 | Expired |
| US4744920A | Borated overbased material | Chemistry; Metallurgy | 41 | Expired |
| US5688751A | Salicylate salts as lubricant additives for two-cycle engines | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US6310011A | Overbased metal salts useful as additives for fuels and lubricants | Chemistry; Metallurgy | 23 | Expired |
| US4627928A | Basic non-carbonated magnesium compositions and fuel, lubricant and additive concentrate compositions containing same | Chemistry; Metallurgy | 21 | Expired |
| US5202036A | Diesel lubricants and methods | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5486300A | Lubricating compositions | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US3951830A | Basic metal salts of sulfur- and methylene-bridged polyphenol compositions, and epoxide-reacted derivatives thereof, and lubricants containing them | Chemistry; Metallurgy | 17 | Expired |
| US5614480A | Lubricating compositions and concentrates | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US5490945A | Lubricating compositions and concentrates | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5562864A | Lubricating compositions and concentrates | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5259966A | Low chlorine overbased calcium salts | Chemistry; Metallurgy | 13 | Expired |
| US4973789A | Lower alkene polymers | Chemistry; Metallurgy | 11 | Expired |
| US5464548A | Lubricants, functional fluid and grease compositions containing sulfite or sulfate overbased metal salts and methods of using the same | Chemistry; Metallurgy | 11 | Expired |
| US4021419A | Basic metal salts of sulfur- and methylene-bridged poly-phenol compositions, and epoxide-reacted derivatives thereof, and lubricants containing them | Chemistry; Metallurgy | 9 | Expired |
| US5449470A | Overbased alkali salts and methods for making same | Chemistry; Metallurgy | 9 | Expired |
| US5268520A | Lower alkene polymers | Chemistry; Metallurgy | 7 | Expired |
| US4982026A | Lower alkene polymers | Chemistry; Metallurgy | 7 | Expired |
| US4775490A | Magnesium overbasing process | Chemistry; Metallurgy | 5 | Expired |
| US5250204A | Sulfite overbased products and process | Chemistry; Metallurgy | 2 | Expired |
| US5173203A | Magnesium overbasing process | Chemistry; Metallurgy | 2 | Expired |
| USH1536H | Overbased materials in ester media | General | 2 | Active |
| US7238651B2 | Process for preparing an overbased detergent | Chemistry; Metallurgy | 1 | Expired |
| US5032299A | Magnesium overbasing process | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.