Joyce H. Zhang

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Sugar Land, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Oil-based insulating packer fluid
- Patent number 8,236,736
- Issue date Aug 7, 2012
- M-I L.L.C.
- Larry H. Leggett
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Oil-based insulating packer fluid
- Patent number 7,863,223
- Issue date Jan 4, 2011
- M-I L.L.C.
- Larry H. Leggett
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

Information Patent Application
OIL-BASED INSULATING PACKER FLUID
- Publication number 20110065613
- Publication date Mar 17, 2011
- M-I L.L.C.
- Larry H. Leggett
- E21 - EARTH DRILLING MINING
Information Patent Application
OIL-BASED INSULATING PACKER FLUID
- Publication number 20070149412
- Publication date Jun 28, 2007
- M-I L.L.C.
- Larry H. Leggett
- E21 - EARTH DRILLING MINING