Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8076269 | Compressible objects combined with a drilling fluid to form a variable density drilling mud | Dennis G. Peiffer, Ramesh Gupta, Norman Pokutylowicz, Barbara Carstensen, Michael J. Luton +1 more | 2011-12-13 |
| 7980329 | System for managing variable density drilling mud | Paul Matthew Spiecker, Pavlin B. Entchev, Ramesh Gupta, Barbara Carstensen, Dennis G. Peiffer +1 more | 2011-07-19 |
| 7972555 | Method for fabricating compressible objects for a variable density drilling mud | Dennis G. Peiffer, Ramesh Gupta, Norman Pokutylowicz, Barbara Carstensen, Michael J. Luton +1 more | 2011-07-05 |