Zahradnik; Anton F.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Zahradnik; Anton F..The latest application filed is for "hybrid drill bit and design method".
Company Profile
4.46.45
- Zahradnik; Anton F. - Sugar Land TX
- Zahradnik; Anton F. - Sugarland TX US
- Zahradnik; Anton F. - Corsicana TX
Patent Activity
| Patent | Date |
|---|---|
| Hybrid drill bit and design method Grant 10,871,036 - Zahradnik , et al. December 22, 2 | 2020-12-22 |
| Hybrid Drill Bit And Design Method App 20190352971 - Zahradnik; Anton F. ; et al. | 2019-11-21 |
| Hybrid drill bit and design method Grant 10,316,589 - Zahradnik , et al. | 2019-06-11 |
| Hybrid drill bits having increased drilling efficiency Grant 10,190,366 - Zahradnik , et al. Ja | 2019-01-29 |
| Hybrid drill bits Grant 10,072,462 - Zahradnik , et al. September 11, 2 | 2018-09-11 |
| Earth-boring tools and methods of forming earth-boring tools Grant 9,810,026 - Zahradnik November 7, 2 | 2017-11-07 |
| Hybrid drill bit Grant 9,670,736 - Zahradnik , et al. June 6, 2 | 2017-06-06 |
| Hybrid Drill Bits Having Increased Drilling Efficiency App 20160251902 - ZAHRADNIK; Anton F. ; et al. | 2016-09-01 |
| Hybrid Drill Bits App 20160230467 - Zahradnik; Anton F. ; et al. | 2016-08-11 |
| Hybrid drill bits having increased drilling efficiency Grant 9,353,575 - Zahradnik , et al. May 31, 2 | 2016-05-31 |
| Drill bit with a dynamic metal seal Grant 9,316,055 - Lin , et al. April 19, 2 | 2016-04-19 |
| Enhanced backup ring edge features for metal face seal in roller cone drill bits Grant 9,249,629 - Lin , et al. February 2, 2 | 2016-02-02 |
| Enhanced Backup Ring Edge Features for Metal Face Seal in Roller Cone Drill Bits App 20150330152 - Lin; Chih ; et al. | 2015-11-19 |
| Expandable reamer tools Grant 9,187,960 - Radford , et al. November 17, 2 | 2015-11-17 |
| Enhanced backup ring features for metal face seal in roller cone drill bits Grant 9,157,280 - Lin , et al. October 13, 2 | 2015-10-13 |
| Earth-boring Tools And Methods Of Forming Earth-boring Tools App 20150107909 - Zahradnik; Anton F. | 2015-04-23 |
| System and method for adjusting roller cone profile on hybrid bit Grant 8,978,786 - Nguyen , et al. March 17, 2 | 2015-03-17 |
| Earth-boring tools and methods of forming earth-boring tools Grant 8,925,654 - Zahradnik January 6, 2 | 2015-01-06 |
| Drill Bit with a Dynamic Metal Seal App 20140326514 - Lin; Chih ; et al. | 2014-11-06 |
| Enhanced Backup Ring Features for Metal Face Seal in Roller Cone Drill Bits App 20140225327 - Lin; Chih ; et al. | 2014-08-14 |
| Enhanced Backup Ring Edge Features for Metal Face Seal in Roller Cone Drill Bits App 20140225328 - Lin; Chih ; et al. | 2014-08-14 |
| Hybrid Drill Bit And Design Method App 20140202771 - ZAHRADNIK; Anton F. ; et al. | 2014-07-24 |
| Hybrid Drill Bit App 20140151131 - Zahradnik; Anton F. ; et al. | 2014-06-05 |
| Hybrid drill bit and design method Grant 8,678,111 - Zahradnik , et al. March 25, 2 | 2014-03-25 |
| Hybrid Drill Bits Having Increased Drilling Efficiency App 20130313021 - Zahradnik; Anton F. ; et al. | 2013-11-28 |
| Expandable Reamer Methods App 20130264122 - Radford; Steven R. ; et al. | 2013-10-10 |
| Earth-boring Tools And Methods Of Forming Earth-boring Tools App 20130146370 - Zahradnik; Anton F. | 2013-06-13 |
| Hybrid drill bit Grant 8,459,378 - Zahradnik , et al. June 11, 2 | 2013-06-11 |
| Expandable earth-boring wellbore reamers and related methods Grant 8,453,763 - Radford , et al. June 4, 2 | 2013-06-04 |
| Modular hybrid drill bit Grant 8,356,398 - McCormick , et al. January 22, 2 | 2013-01-22 |
| System And Method For Adjusting Roller Cone Profile On Hybrid Bit App 20120111638 - NGUYEN; Don Q. ; et al. | 2012-05-10 |
| Hybrid drill bit with high bearing pin angles Grant 8,141,664 - Zahradnik , et al. March 27, 2 | 2012-03-27 |
| Expandable Earth-boring Wellbore Reamers And Related Methods App 20110266060 - Radford; Steven R. ; et al. | 2011-11-03 |
| Conformal bearing for rock drill bit Grant 8,028,770 - Dick , et al. October 4, 2 | 2011-10-04 |
| Expandable Reamers for Earth Boring Applications App 20110203849 - Radford; Steven R. ; et al. | 2011-08-25 |
| Expandable reamers for earth-boring applications and methods of using the same Grant 7,997,354 - Radford , et al. August 16, 2 | 2011-08-16 |
| Threaded cone retention system for roller cone bits Grant 7,975,779 - Zahradnik , et al. July 12, 2 | 2011-07-12 |
| Modular Hybrid Drill Bit App 20110120269 - McCORMICK; Ron D. ; et al. | 2011-05-26 |
| Conformal Bearing For Rock Drill Bit App 20110061940 - Dick; Aaron J. ; et al. | 2011-03-17 |
| Expandable reamers for earth boring applications Grant 7,900,717 - Radford , et al. March 8, 2 | 2011-03-08 |
| Bearing Systems Containing Diamond Enhanced Materials And Downhole Applications For Same App 20110024198 - Dick; Aaron J. ; et al. | 2011-02-03 |
| Conformal bearing for rock drill bit Grant 7,861,805 - Dick , et al. January 4, 2 | 2011-01-04 |
| Shank structure for rotary drill bits Grant 7,861,806 - Zahradnik , et al. January 4, 2 | 2011-01-04 |
| Hybrid drill bit and method of drilling Grant 7,845,435 - Zahradnik , et al. December 7, 2 | 2010-12-07 |
| Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit Grant 7,841,426 - Zahradnik , et al. November 30, 2 | 2010-11-30 |
| Hybrid Drill Bit App 20100288561 - Zahradnik; Anton F. ; et al. | 2010-11-18 |
| Hybrid Drill Bit With High Bearing Pin Angles App 20100224417 - ZAHRADNIK; Anton F. ; et al. | 2010-09-09 |
| Hybrid Drill Bit With High Pilot-to-journal Diameter Ratio App 20100155146 - Nguyen; Don Q. ; et al. | 2010-06-24 |
| Bearing Seal With Improved Contact Width App 20100147595 - Zahradnik; Anton F. ; et al. | 2010-06-17 |
| Threaded Cone Retention System For Roller Cone Bits App 20100071959 - Zahradnik; Anton F. ; et al. | 2010-03-25 |
| Shank Structure For Rotary Drill Bits App 20100012392 - Zahradnik; Anton F. ; et al. | 2010-01-21 |
| Earth Boring Bit with DLC Coated Bearing and Seal App 20090321146 - Dick; Aaron J. ; et al. | 2009-12-31 |
| Conformal Bearing For Rock Drill Bit App 20090283332 - Dick; Aaron J. ; et al. | 2009-11-19 |
| Modular Hybrid Drill Bit App 20090272582 - McCORMICK; Ron D. ; et al. | 2009-11-05 |
| Rotary drill bits Grant 7,600,589 - Zahradnik , et al. October 13, 2 | 2009-10-13 |
| Methods of fabricating rotary drill bits Grant 7,594,454 - Zahradnik , et al. September 29, 2 | 2009-09-29 |
| Downhole Tool Bearing System Containing Diamond Enhanced Materials App 20090205873 - Dick; Aaron J. ; et al. | 2009-08-20 |
| Hybrid Drill Bit And Design Method App 20090126998 - Zahradnik; Anton F. ; et al. | 2009-05-21 |
| Roller Cone Bit Bearing, and Bearing Materials App 20090014217 - Zahradnik; Anton F. ; et al. | 2009-01-15 |
| Rotary drill bit shank, rotary drill bits so equipped, and methods of manufacture Grant 7,472,764 - Zahradnik , et al. January 6, 2 | 2009-01-06 |
| Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit App 20080296068 - Zahradnik; Anton F. ; et al. | 2008-12-04 |
| Hybrid Drill Bit and Method of Drilling App 20080264695 - Zahradnik; Anton F. ; et al. | 2008-10-30 |
| System, method, and apparatus for contoured thrust surfaces between thrust washer and head for roller cone drill bit App 20080245577 - Zahradnik; Anton F. ; et al. | 2008-10-09 |
| Seal insert ring for roller cone bits Grant 7,392,862 - Zahradnik , et al. July 1, 2 | 2008-07-01 |
| Bearing insert sleeve for roller cone bit Grant 7,387,177 - Zahradnik , et al. June 17, 2 | 2008-06-17 |
| Expandable Reamers For Earth Boring Applications App 20080128175 - Radford; Steven R. ; et al. | 2008-06-05 |
| Expandable Reamers For Earth-boring Applications And Methods Of Using The Same App 20080128174 - Radford; Steven R. ; et al. | 2008-06-05 |
| Bearing Insert Sleeve For Roller Cone Bit App 20080093128 - Zahradnik; Anton F. ; et al. | 2008-04-24 |
| Rotary Drill Bits App 20080066970 - Zahradnik; Anton F. ; et al. | 2008-03-20 |
| Methods Of Fabricating Rotary Drill Bits App 20080066581 - Zahradnik; Anton F. ; et al. | 2008-03-20 |
| Seal insert ring for roller cone bits App 20070158114 - Zahradnik; Anton F. ; et al. | 2007-07-12 |
| System, method, and apparatus for reducing residual stress in as-welded roller cone bit ball plug welds App 20070014495 - Zahradnik; Anton F. ; et al. | 2007-01-18 |
| Rotary drill bit shank, rotary drill bits so equipped, and methods of manufacture App 20060213693 - Zahradnik; Anton F. ; et al. | 2006-09-28 |
| Steel body drill bits with tailored hardfacing structural elements Grant 6,651,756 - Costo, Jr. , et al. November 25, 2 | 2003-11-25 |
| Earth-boring bit with improved bearing seal Grant 6,142,249 - Zahradnik , et al. November 7, 2 | 2000-11-07 |
| Earth-boring bit with improved bearing seal Grant 6,026,917 - Zahradnik , et al. February 22, 2 | 2000-02-22 |
| Earth-boring bit having an improved hard-faced tooth structure Grant 5,351,769 - Scott , et al. October 4, 1 | 1994-10-04 |
| Earth-boring bit having an improved hard-faced tooth structure Grant 5,351,771 - Zahradnik October 4, 1 | 1994-10-04 |
| Mechanical lock to prevent seal ring rotation Grant 5,295,549 - Dolezal , et al. March 22, 1 | 1994-03-22 |
| Compensator for earth boring bits Grant 4,727,942 - Galle , et al. March 1, 1 | 1988-03-01 |
| Floating seal for earth boring bit Grant 4,428,687 - Zahradnik January 31, 1 | 1984-01-31 |
uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.
While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.
All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.
| 