Jian-Chyun Shen

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Irvine, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Well preflush fluid
- Patent number 5,082,499
- Issue date Jan 21, 1992
- Union Oil Company of California
- Jian-Chyun Shen
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Process and composition for treating underground formations penetra...
- Patent number 5,035,813
- Issue date Jul 30, 1991
- Union Oil Company of California
- Jian-Chyun Shen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Well forming process
- Patent number 4,924,942
- Issue date May 15, 1990
- Union Oil Company of California
- Jian-Chyun Shen
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Process and composition for treating underground formations penetra...
- Patent number 4,844,164
- Issue date Jul 4, 1989
- Union Oil Company of California
- Jian-Chyun Shen
- E21 - EARTH DRILLING MINING