Stephen Martin Evans

Person

Standish, GB

People

Patents Grantslast 30 patents

Information Patent Grant
Method of applying a wear-resistant layer to a surface of a downhol...
- Patent number 6,575,350
- Issue date Jun 10, 2003
- Stephen Martin Evans
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Wear resistant drill bit
- Patent number 6,454,028
- Issue date Sep 24, 2002
- Camco International (UK) Limited
- Stephen M. Evans
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Methods of manufacturing rotary drill bits
- Patent number 6,348,110
- Issue date Feb 19, 2002
- Camco International (UK) Limited
- Stephen Martin Evans
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of applying a wear-resistant layer to a surface of a downhol...
- Patent number 6,234,261
- Issue date May 22, 2001
- Camco International (UK) Limited
- Stephen Martin Evans
- E21 - EARTH DRILLING MINING
Information Patent Grant
Methods of manufacturing rotary drill bits
- Patent number 6,148,936
- Issue date Nov 21, 2000
- Camco International (UK) Limited
- Stephen Martin Evans
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Methods of manufacturing rotary drill bits
- Patent number 6,116,360
- Issue date Sep 12, 2000
- Camco International (UK) Limited
- Stephen Martin Evans
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Matrix hard facing by lost wax process
- Patent number 5,944,128
- Issue date Aug 31, 1999
- Camco International (UK) Limited
- David Truax
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
In or relating to rotary drill bits
- Patent number 5,732,783
- Issue date Mar 31, 1998
- Camco Drilling Group Limited of Hycalog
- David Truax
- B22 - CASTING POWDER METALLURGY

Patents Applicationslast 30 patents

Information Patent Application
Wear resistant drill bit
- Publication number 20020084111
- Publication date Jul 4, 2002
- Stephen M. Evans
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Method of applying a wear-resistant layer to a surface of a downhol...
- Publication number 20010030067
- Publication date Oct 18, 2001
- Stephen Martin Evans
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
Method of applying a wear-resistant layer to a surface of a downhol...
- Publication number 20010017224
- Publication date Aug 30, 2001
- Stephen Martin Evans
- E21 - EARTH DRILLING MINING

Stephen Martin Evans

Person

Patents Grantslast 30 patents

Method of applying a wear-resistant layer to a surface of a downhol...

Wear resistant drill bit

Methods of manufacturing rotary drill bits

Method of applying a wear-resistant layer to a surface of a downhol...

Methods of manufacturing rotary drill bits

Methods of manufacturing rotary drill bits

Matrix hard facing by lost wax process

In or relating to rotary drill bits

Patents Applicationslast 30 patents

Wear resistant drill bit

Method of applying a wear-resistant layer to a surface of a downhol...

Method of applying a wear-resistant layer to a surface of a downhol...