Christian Zurdo

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La Haye Pays-Bas, FR

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Patents Grantslast 30 patents

Information Patent Grant
Process for using biodegradable drilling muds
- Patent number 6,634,442
- Issue date Oct 21, 2003
- Elf Exploration Production
- Josiane Durrieu
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Biodegradable drilling mud and process for its preparation
- Patent number 6,426,321
- Issue date Jul 30, 2002
- Elf Exploration Production
- Josiane Durrieu
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for enzyme pretreatment of drill cuttings
- Patent number 5,725,771
- Issue date Mar 10, 1998
- Elf Aquitaine Production
- Sophie Aliphat
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE