John Lofton

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Woodlands, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
System and method for regulating pressure within a well annulus
- Patent number 8,353,351
- Issue date Jan 15, 2013
- Chevron U.S.A. Inc.
- Robert B. Carpenter
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and system for minimizing circulating fluid return losses du...
- Patent number 6,938,707
- Issue date Sep 6, 2005
- Chevron U.S.A. Inc.
- Joseph H. Schmidt
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

Information Patent Application
System And Method For Regulating Pressure Within A Well Annulus
- Publication number 20110284209
- Publication date Nov 24, 2011
- Robert B. Carpenter
- E21 - EARTH DRILLING MINING
Information Patent Application
Method and system for minimizing circulating fluid return losses du...
- Publication number 20040226746
- Publication date Nov 18, 2004
- Chevron U.S.A. Inc.
- Joseph H. Schmidt
- E21 - EARTH DRILLING MINING