Jancha; Robert A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Jancha; Robert A..The latest application filed is for "integral multiple stage safety valves".
- Jancha; Robert A. - Porter TX US
- Jancha; Robert A. - Humble TX
| Patent | Date |
|---|---|
| Integral multiple stage safety valves Grant 9,133,688 - Jancha , et al. September 15, 2 | 2015-09-15 |
| Integral Multiple Stage Safety Valves App 20140034325 - Jancha; Robert A. ; et al. | 2014-02-06 |
| Subsurface valve with system and method for sealing Grant 6,854,519 - Deaton , et al. February 15, 2 | 2005-02-15 |
| Curved flapper with angle variant seat for a subsurface safety valve Grant 6,851,477 - Hill, Jr. , et al. February 8, 2 | 2005-02-08 |
| Subsurface valve with system and method for sealing App 20030205389 - Deaton, Thomas Michael ; et al. | 2003-11-06 |
| Curved flapper with angle variant seat for a subsurface safety valve App 20030121664 - Hill, Thomas G. JR. ; et al. | 2003-07-03 |
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