Societe Lyonnaise des Eaux, S.A.

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Patents Grantslast 30 patents

Information Patent Grant
Process for extruding semi-permeable membrane having separate hollo...
- Patent number 5,171,493
- Issue date Dec 15, 1992
- Societe Lyonnaise des Eaux (Societe Anonyme)
- Philippe Aptel
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Process for producing a semi-permeable membrane by extrusion
- Patent number 5,089,187
- Issue date Feb 18, 1992
- Societe Lyonnaise des Eaux, S.A.
- Philippe Aptel
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Draw plate for the production of membranes of an organic material
- Patent number 5,046,936
- Issue date Sep 10, 1991
- Societe Lyonnaise des Eaux, S.A.
- Daniel Bourdiol
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Process for production of a bundle of hollow semi-permeable fibers
- Patent number 4,948,444
- Issue date Aug 14, 1990
- Societe Lyonnaise Des Eaux
- Richard A. Schutz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method and a device for detecting changes in a surface state and fo...
- Patent number 4,916,317
- Issue date Apr 10, 1990
- Societe Lyonnaise Des Eaux
- Jean-Marie Gabriel
- G01 - MEASURING TESTING

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