Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10151148 | Composite metallic elastomeric sealing components for roller cone drill bits | David A. Curry, Chih Lin, Stuart Hall | 2018-12-11 |
| 9249629 | Enhanced backup ring edge features for metal face seal in roller cone drill bits | Chih Lin, Anton F. Zahradnik, Gregory L. Ricks | 2016-02-02 |
| 9157280 | Enhanced backup ring features for metal face seal in roller cone drill bits | Chih Lin, Anton F. Zahradnik, Alejandro Flores, Gregory L. Ricks | 2015-10-13 |
| 8967301 | Composite metallic elastomeric sealing components for roller cone drill bits | David A. Curry, Chih Lin, Stuart Hall | 2015-03-03 |
| 8028770 | Conformal bearing for rock drill bit | Aaron J. Dick, Chih Lin, Anton F. Zahradnik, Daniel E. Scott, Don Q. Nguyen +4 more | 2011-10-04 |
| 7975779 | Threaded cone retention system for roller cone bits | Anton F. Zahradnik, Don Q. Nguyen, Eric C. Sullivan, Aaron J. Dick, Scott Shiqiang Shu | 2011-07-12 |
| 7914006 | Drilling tool with elastomer seal having graded properties | Redd H. Smith | 2011-03-29 |
| 7708090 | Excluder ring for earth-boring bit | Anton F. Zahradnik, Gregory L. Ricks, Gregory W. Peterson, Don Q. Nguyen, Chih Lin | 2010-05-04 |
| 7413037 | Metal face seal for an earth-boring bit | Chih Lin, Don Q. Nguyen, Gregory L. Ricks | 2008-08-19 |
| 7392862 | Seal insert ring for roller cone bits | Anton F. Zahradnik, Don Q. Nguyen, Ronny D. McCormick, Michael J. Veasey | 2008-07-01 |
| 7387177 | Bearing insert sleeve for roller cone bit | Anton F. Zahradnik, Don Q. Nguyen, Aaron J. Dick, Eric C. Sullivan, Scott Shiqiang Shu | 2008-06-17 |
| 7350600 | Shirttails for reducing damaging effects of cuttings | Christopher C. Beuershausen, Raul E. Lema, Ronald Hales, Don Q. Nguyen, Gregory L. Ricks +6 more | 2008-04-01 |
| 7311159 | PCD face seal for earth-boring bit | Chih Lin, Danny E. Scott | 2007-12-25 |
| 7182162 | Shirttails for reducing damaging effects of cuttings | Christopher C. Beuershausen, Raul E. Lema, Ronald Hales, Don Q. Nguyen, Gregory L. Ricks +6 more | 2007-02-27 |
| 7168147 | Method for manufacturing a drilling tool with an elastomer seal having graded properties | Redd H. Smith, Jiri George Drobny | 2007-01-30 |
| 7066286 | Gage surface scraper | Don Q. Nguyen, Gregory L. Ricks, Mark E. Morris, Chris M. McCarty, Chih Lin | 2006-06-27 |
| 6684966 | PCD face seal for earth-boring bit | Chih Lin, Danny E. Scott | 2004-02-03 |
| 6142249 | Earth-boring bit with improved bearing seal | Anton F. Zahradnik, Eric C. Sullivan, Chih Lin, Scott Ray Schmidt | 2000-11-07 |
| 6056072 | Lubricating grease | Thomas F. Willey | 2000-05-02 |
| 6026917 | Earth-boring bit with improved bearing seal | Anton F. Zahradnik, Eric C. Sullivan, Chih Lin, Scott Ray Schmidt | 2000-02-22 |
| 5891830 | Lubricating grease | Thomas F. Willey | 1999-04-06 |
| 5015401 | Bearings grease for rock bit bearings | David K. Landry | 1991-05-14 |