Fei Tang

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Katy, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Downhole tool with passive barrier
- Patent number 12,116,881
- Issue date Oct 15, 2024
- SPARTAN TECHNOLOGY DEVELOPMENT CORP.
- Jeffrey Johnston
- E21 - EARTH DRILLING MINING
Information Patent Grant
Gate valve having low-friction coating over substrate and method fo...
- Patent number 9,206,910
- Issue date Dec 8, 2015
- Vetco Gray Inc.
- Jon Bonner Kahn
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
DOWNHOLE TOOL WITH PASSIVE BARRIER
- Publication number 20230083743
- Publication date Mar 16, 2023
- SPARTAN DOWNHOLE, LLC
- JEFFREY JOHNSTON
- E21 - EARTH DRILLING MINING
Information Patent Application
Gate Valve Having Low-Friction Coating Over Substrate and Method fo...
- Publication number 20120261603
- Publication date Oct 18, 2012
- Vetco Gray Inc.
- Jon Bonner Kahn
- E21 - EARTH DRILLING MINING