Walter R. Rothrock

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New Caney, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Systems and methods for vapor pressure leaching polycrystalline dia...
- Patent number 9,156,136
- Issue date Oct 13, 2015
- National-Oilwell Varco, L.P.
- Guodong Zhan
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
Anti-Balling Drill Bit and Method of Making Same
- Publication number 20180016848
- Publication date Jan 18, 2018
- National Oilwell DHT, L.P.
- Anil Kumar
- E21 - EARTH DRILLING MINING
Information Patent Application
ELECTROCHEMICAL CORROSION OF CATALYST MATERIAL FROM PCD ELEMENTS
- Publication number 20170282334
- Publication date Oct 5, 2017
- National-Oilwell Varco, L.P.
- K. Danie EFIRD
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
Systems and Methods for Vapor Pressure Leaching Polycrystalline Dia...
- Publication number 20140123565
- Publication date May 8, 2014
- National-Oilwell Varco, L.P.
- Guodong Zhan
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...