David R. Holmes

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Frodsham, GB

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Patents Grantslast 30 patents

Information Patent Grant
Method for the production of an asymmetric semipermeable membrane f...
- Patent number 5,112,892
- Issue date May 12, 1992
- Imperial Chemical Industries PLC
- Peter T. Cardew
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Membranes
- Patent number 5,030,672
- Issue date Jul 9, 1991
- Imperial Chemical Industries PLC
- Richard A. Hann
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Membranes
- Patent number 4,920,193
- Issue date Apr 24, 1990
- Imperial Chemical Industries PLC
- Richard A. Hann
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...