Issued Patents All Time
Showing 101–125 of 135 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6231664 | Well sealing compositions and methods | Jiten Chatterji, David D. Onan, Roger S. Cromwell | 2001-05-15 |
| 6227294 | Methods of cementing subterranean zones | Jiten Chatterji, Roger S. Cromwell, Dennis W. Gray, Darrell Chad Brenneis | 2001-05-08 |
| 6220354 | High strength foamed well cement compositions and methods | Jiten Chatterji, Frank Zamora, Clyde R. Anderson, Billy Bennett, Roger S. Cromwell | 2001-04-24 |
| 6209646 | Controlling the release of chemical additives in well treating fluids | Baireddy R. Reddy, Ronald J. Crook, Jiten Chatterji, Dennis W. Gray, Russell M. Fitzgerald +2 more | 2001-04-03 |
| 6202751 | Methods and compositions for forming permeable cement sand screens in well bores | Jiten Chatterji, Roger S. Cromwell, Baireddy R. Reddy, Philip D. Nguyen, David L. Brown | 2001-03-20 |
| 6156808 | Defoaming compositions and methods | Jiten Chatterji, Roger S. Cromwell | 2000-12-05 |
| 6098711 | Compositions and methods for sealing pipe in well bores | Jiten Chatterji, Roger S. Cromwell, David D. Onan | 2000-08-08 |
| 6068055 | Well sealing compositions and methods | Jiten Chatterji, David D. Onan, Roger S. Cromwell | 2000-05-30 |
| 6063738 | Foamed well cement slurries, additives and methods | Jiten Chatterji, Roger S. Cromwell, Frank Zamora | 2000-05-16 |
| 6059036 | Methods and compositions for sealing subterranean zones | Jiten Chatterji, Lewis R. Norman, David D. Onan, Roger S. Cromwell | 2000-05-09 |
| 6059035 | Subterranean zone sealing methods and compositions | Jiten Chatterji, David D. Onan, Roger S. Cromwell | 2000-05-09 |
| 6006836 | Methods of sealing plugs in well bores | Jiten Chatterji, David D. Onan, Patty L. Onan, Roger S. Cromwell | 1999-12-28 |
| 5969006 | Remedial well bore sealing methods | David D. Onan, Jiten Chatterji, Roger S. Cromwell, Patty L. Onan | 1999-10-19 |
| 5964293 | Well completion methods using rubber latex compositions in subterranean formations containing salt zones | Jiten Chatterji, James F. Heathman | 1999-10-12 |
| 5957204 | Method of sealing conduits in lateral well bores | Jiten Chatterji, David D. Onan, Roger S. Cromwell | 1999-09-28 |
| 5911282 | Well drilling fluids containing epoxy sealants and methods | David D. Onan, Jiten Chatterji, Roger S. Cromwell, Patty L. Onan | 1999-06-15 |
| 5909774 | Synthetic oil-water emulsion drill-in fluid cleanup methods | James E. Griffith, Jiten Chatterji, Bryan K. Waugh, Patty L. Onan | 1999-06-08 |
| 5897699 | Foamed well cement compositions, additives and methods | Jiten Chatterji, David D. Onan, Roger S. Cromwell | 1999-04-27 |
| 5875846 | Methods of modifying subterranean strata properties | Jiten Chatterji, David D. Onan, Patty L. Onan, Roger S. Cromwell | 1999-03-02 |
| 5875844 | Methods of sealing pipe strings in well bores | Jiten Chatterji, David D. Onan, Roger S. Cromwell, Patty L. Onan | 1999-03-02 |
| 5873413 | Methods of modifying subterranean strata properties | Jiten Chatterji, David D. Onan, Roger S. Cromwell, Patty L. Onan | 1999-02-23 |
| 5820670 | Resilient well cement compositions and methods | Jiten Chatterji, Patty L. Onan, David D. Onan | 1998-10-13 |
| 5795924 | Resilient well cement compositions and methods | Jiten Chatterji, Patty L. Totten, David D. Onan | 1998-08-18 |
| 5711801 | Cement compositions | Jiten Chatterji, James E. Griffith, Patty L. Totten | 1998-01-27 |
| 5711383 | Cementitious well drilling fluids and methods | Dralen T. Terry, Garland W. Davis, Jiten Chatterji, David D. Onan, Patty L. Totten | 1998-01-27 |