John Astleford

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Lincoln, GB

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Patents Grantslast 30 patents

Information Patent Grant
Recovery of hydrocarbons
- Patent number 7,703,537
- Issue date Apr 27, 2010
- John Astleford
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill fluid screening device
- Patent number 7,556,154
- Issue date Jul 7, 2009
- John Astleford
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING

Patents Applicationslast 30 patents

Information Patent Application
Apparatus for and method of recovering clean drilling fluid from fl...
- Publication number 20120067831
- Publication date Mar 22, 2012
- John Astleford
- E21 - EARTH DRILLING MINING
Information Patent Application
RECOVERY OF HYDROCARBONS
- Publication number 20090084548
- Publication date Apr 2, 2009
- John Astleford
- E21 - EARTH DRILLING MINING
Information Patent Application
Drill fluid screening device
- Publication number 20060081508
- Publication date Apr 20, 2006
- John Astleford
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING