David B. Jennings

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St. Etienne, FR

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Patents Grantslast 30 patents

Information Patent Grant
Aqueous spacer composition compatible with drilling muds and cement...
- Patent number 5,101,902
- Issue date Apr 7, 1992
- Dowell Schlumberger Incorporated
- Philippe Parcevaux
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...