Marcel Norais

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Savenay, FR

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Patents Grantslast 30 patents

Information Patent Grant
Sludge filtration device comprising a filter piston, and sludge tre...
- Patent number 6,110,388
- Issue date Aug 29, 2000
- ELF Atochem S.A.
- Marcel Norais
- B30 - PRESSES
Information Patent Grant
Separation of sludge from liquid by piston-aided filtration
- Patent number 5,979,304
- Issue date Nov 9, 1999
- Elf Atochem S.A.
- Marcel Norais
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL