David E. Clark
35Patents
18h-index
30Co-inventors
81Inventor score
Filing activity: Jan 9, 1979 → Dec 5, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7709421B2 | Microemulsions to convert OBM filter cakes to WBM filter cakes having filtration control | Chemistry; Metallurgy | 111 | Active |
| US4189325A | Glass-ceramic dental restorations | Chemistry; Metallurgy | 98 | Expired |
| US8822386B2 | Nanofluids and methods of use for drilling and completion fluids | Chemistry; Metallurgy | 96 | Active |
| US7134496B2 | Method of removing an invert emulsion filter cake after the drilling process using a single phase microemulsion | Emerging Cross-Sectional Technologies | 77 | Expired |
| US7838467B2 | Microemulsions to convert OBM filter cakes to WBM filter cakes having filtration control | Chemistry; Metallurgy | 62 | Active |
| US4921731A | Deposition of ceramic coatings using sol-gel processing with application of a thermal gradient | Chemistry; Metallurgy | 57 | Expired |
| US8091646B2 | Single phase microemulsions and in situ microemulsions for cleaning formation damage | Fixed Constructions | 57 | Active |
| US5586608A | Method of making an anti-bit balling well fluid using a polyol having a cloud point, and method of drilling | Emerging Cross-Sectional Technologies | 56 | Expired |
| US7687439B2 | Method of removing an invert emulsion filter cake after the drilling process using a single phase microemulsion | Emerging Cross-Sectional Technologies | 54 | Active |
| US8235120B2 | Mesophase fluids with extended chain surfactants for downhole treatments | Chemistry; Metallurgy | 53 | Active |
| US8091645B2 | In situ fluid formation for cleaning oil- or synthetic oil-based mud | Fixed Constructions | 51 | Active |
| US8357639B2 | Nanoemulsions | Chemistry; Metallurgy | 50 | Active |
| US8356667B2 | Liquid crystals for drilling, completion and production fluids | Chemistry; Metallurgy | 49 | Active |
| US8415279B2 | Microemulsions used as spacer fluids | Chemistry; Metallurgy | 49 | Active |
| US8091644B2 | Microemulsion or in-situ microemulsion for releasing stuck pipe | Chemistry; Metallurgy | 49 | Active |
| US8210263B2 | Method for changing the wettability of rock formations | Chemistry; Metallurgy | 49 | Active |
| US4801399A | Inorganic salts as peptizing agents in the preparation of metal oxide sol-gel compositions | Chemistry; Metallurgy | 44 | Expired |
| US5658860A | Environmentally safe lubricated well fluid method of making a well fluid and method of drilling | Chemistry; Metallurgy | 33 | Expired |
| US6262405A | Medical waste treatment and decontamination system | Electricity | 16 | Expired |
| US5843287A | Method for recovering metals from waste | Electricity | 16 | Expired |
| US5160455A | Fabrication of homogenous sol-gel derived multiphase materials using gelling control agents | Chemistry; Metallurgy | 16 | Expired |
| US6789659B2 | Stator winding system and method with pallet on pallet arrangement | Electricity | 15 | Expired |
| US5968400A | Tandem microwave waste remediation and decontamination system | Electricity | 13 | Expired |
| US4861410A | Method of joining metal oxide containing ceramic bodies | Chemistry; Metallurgy | 9 | Expired |
| US6420457B1 | Microwave treatment of vulcanized rubber | Emerging Cross-Sectional Technologies | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.