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Terry R. Matthias
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Gloucester, GB
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Patents Grants
last 30 patents
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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
Information
Patent Grant
Drill bit and cutter therefor
Patent number
4,862,977
Issue date
Sep 5, 1989
Reed Tool Company, Ltd.
John D. Barr
E21 - EARTH DRILLING MINING
Information
Patent Grant
Rotary drill bits
Patent number
4,727,946
Issue date
Mar 1, 1988
NL Industries, Inc.
John D. Barr
E21 - EARTH DRILLING MINING
Information
Patent Grant
Drill bit and cutter therefor
Patent number
4,669,556
Issue date
Jun 2, 1987
NL Industries, Inc.
John D. Barr
E21 - EARTH DRILLING MINING
Information
Patent Grant
Drill bit cutter
Patent number
4,570,725
Issue date
Feb 18, 1986
NL Industries, Inc.
Terry R. Matthias
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
OPTIMUM POWDER PLACEMENT IN POLYCRYSTALLINE DIAMOND CUTTERS
Publication number
20140231151
Publication date
Aug 21, 2014
National-Oilwell Varco, L.P.
Terry Richard Matthias
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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...
Information
Patent Application
METHOD FOR DISTRIBUTING GRANULAR COMPONENTS IN POLYCRYSTALLINE DIAM...
Publication number
20100014931
Publication date
Jan 21, 2010
Terry R. Matthias
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...