Stren Company

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Backflush filter system for downhole pumps
- Patent number 5,494,109
- Issue date Feb 27, 1996
- Stren Company
- Kenneth J. Schmitt
- E21 - EARTH DRILLING MINING
Information Patent Grant
Backflush filter system for downhole pumps
- Patent number 5,413,721
- Issue date May 9, 1995
- Stren Company
- Kenneth J. Schmitt
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reciprocating rod type downhole pump
- Patent number 4,969,518
- Issue date Nov 13, 1990
- Stren Company
- Kenneth J. Schmitt
- E21 - EARTH DRILLING MINING