Clarence O. Walker
19Patents
13h-index
11Co-inventors
75Inventor score
Filing activity: Nov 16, 1973 → Apr 9, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4633950A | Method for controlling lost circulation of drilling fluids with hydrocarbon absorbent polymers | Emerging Cross-Sectional Technologies | 105 | Expired |
| US4614599A | Encapsulated lime as a lost circulation additive for aqueous drilling fluids | Emerging Cross-Sectional Technologies | 97 | Expired |
| US4664816A | Encapsulated water absorbent polymers as lost circulation additives for aqueous drilling fluids | Emerging Cross-Sectional Technologies | 69 | Expired |
| US4704213A | Encapsulated oil absorbent polymers as lost circulation additives for oil based drilling fluids | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4635726A | Method for controlling lost circulation of drilling fluids with water absorbent polymers | Fixed Constructions | 41 | Expired |
| US3953337A | Method of drilling wells employing water base drilling fluids | Chemistry; Metallurgy | 38 | Expired |
| US7354194B2 | Tympanic thermometer probe cover with film support mechanism | Physics | 24 | Expired |
| US4494610A | Method for releasing stuck drill pipe | Emerging Cross-Sectional Technologies | 20 | Expired |
| US7434991B2 | Thermal tympanic thermometer | Physics | 20 | Active |
| US3989630A | Low solids shale controlling drilling fluid | Chemistry; Metallurgy | 18 | Expired |
| US7686506B2 | Stackable tympanic thermometer probe cover cassette | Physics | 17 | Active |
| US4466486A | Method for releasing stuck drill pipe | Emerging Cross-Sectional Technologies | 16 | Expired |
| US7556424B2 | Tympanic thermometer prove cover cassette and holder | Physics | 13 | Active |
| US4230587A | Additive composition for release of stuck drill pipe | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4261422A | Method for treating underground formations | Chemistry; Metallurgy | 9 | Expired |
| US4064056A | Drilling fluids containing an additive composition | Chemistry; Metallurgy | 7 | Expired |
| US7927012B2 | Probe cover cassette with improved probe cover support | Human Necessities | 5 | Active |
| US7478946B2 | Probe cover cassette with improved probe cover support | Human Necessities | 3 | Expired |
| USRE43745E1 | Tympanic thermometer probe cover with film support mechanism | General | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.