Ren; Chunqiao
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ren; Chunqiao.The latest application filed is for "bi-directionally raisable drilling rig mast".
- Ren; Chunqiao - Shanghai CN
| Patent | Date |
|---|---|
| Bi-directionally raisable drilling rig mast Grant 9,488,013 - Donnally , et al. November 8, 2 | 2016-11-08 |
| Drilling rig masts and methods of assembly and erection Grant 9,441,423 - Donnally , et al. September 13, 2 | 2016-09-13 |
| Bi-directionally raisable drilling rig mast Grant 9,163,462 - Donnally , et al. October 20, 2 | 2015-10-20 |
| Bi-directionally Raisable Drilling Rig Mast App 20150052828 - Donnally; Robert Benjamin ; et al. | 2015-02-26 |
| Bi-directionally Raisable Drilling Rig Mast App 20150047908 - Donnally; Robert Benjamin ; et al. | 2015-02-19 |
| Bi-directionally raisable drilling rig mast Grant 8,904,716 - Donnally , et al. December 9, 2 | 2014-12-09 |
| Drilling rig mast lift systems and methods Grant 8,875,911 - Donnally , et al. November 4, 2 | 2014-11-04 |
| Substructure of a mobile drilling rig with a movable center floor section Grant 8,863,449 - Donnally , et al. October 21, 2 | 2014-10-21 |
| Bi-directionally Raisable Drilling Rig Mast App 20130291452 - Donnally; Robert Benjamin ; et al. | 2013-11-07 |
| Substructure Of A Mobile Drilling Rig With A Movable Center Floor Section App 20130276386 - Donnally; Robert Benjamin ; et al. | 2013-10-24 |
| Drilling rig masts and methods of assembly and erecting masts Grant 8,549,815 - Donnally , et al. October 8, 2 | 2013-10-08 |
| Drilling rigs and erection methods Grant 8,468,753 - Donnally , et al. June 25, 2 | 2013-06-25 |
| Drilling rig structure installation and methods Grant 8,250,816 - Donnally , et al. August 28, 2 | 2012-08-28 |
| Drilling Rig Mast Lift Systems And Methods App 20120047820 - Donnally; Robert B. ; et al. | 2012-03-01 |
| Drilling rig drawworks installation Grant 8,047,303 - Donnally , et al. November 1, 2 | 2011-11-01 |
| Grating fastening methods and systems App 20090293417 - Ren; Chunqiao ; et al. | 2009-12-03 |
| Drilling rigs and erection methods App 20090218139 - Donnally; Robert Benjamin ; et al. | 2009-09-03 |
| Drilling rig drawworks installation App 20090218137 - Donnally; Robert Benjamin ; et al. | 2009-09-03 |
| Drilling rig masts and methods of assembly and erecting masts App 20090218144 - Donnally; Robert Benjamin ; et al. | 2009-09-03 |
| Drilling rig structure installation and methods App 20090218138 - Donnally; Robert Benjamin ; et al. | 2009-09-03 |
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