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Jon R. Averhoff
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Houston, TX, US
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last 30 patents
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Patent Grant
Gas displaced chamber lift system having gas lift assist
Patent number
6,354,377
Issue date
Mar 12, 2002
Valence Operating Company
Jon R. Averhoff
E21 - EARTH DRILLING MINING
Information
Patent Grant
Gas displaced chamber lift system with closed loop/multi-stage vents
Patent number
6,269,884
Issue date
Aug 7, 2001
Valence Operating Company
Jon R. Averhoff
E21 - EARTH DRILLING MINING
Information
Patent Grant
Gas displaced chamber lift system having a double chamber
Patent number
6,237,692
Issue date
May 29, 2001
Valence Operating Company
Jon R. Averhoff
E21 - EARTH DRILLING MINING
Information
Patent Grant
Double acting gas displaced chamber lift system and method
Patent number
6,021,849
Issue date
Feb 8, 2000
Jon R. Averhoff
E21 - EARTH DRILLING MINING