David Schwertner
6Patents
4h-index
4Co-inventors
46Inventor score
Filing activity: Apr 17, 1995 → Mar 31, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7271131B2 | Fluid loss control and sealing agent for drilling depleted sand formations | Chemistry; Metallurgy | 54 | Expired |
| US5851958A | Olefins and lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5605879A | Olefin isomers as lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids | Emerging Cross-Sectional Technologies | 25 | Expired |
| US7087555B2 | Drilling fluids comprising sized graphite particles | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7393813B2 | Water-based drilling fluids using latex additives | Chemistry; Metallurgy | 4 | Expired |
| US7977281B2 | Methods for minimizing the amount of graphite particles used during drilling operations | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.