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last 30 patents
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Patent Grant
Chain-lengthening agents for p-phenylene-methylenediisocyanate-prep...
Patent number
5,026,815
Issue date
Jun 25, 1991
Lonza Ltd.
Theodor Volker
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Substituted P,P'-methylene-bis-aniline
Patent number
4,978,791
Issue date
Dec 18, 1990
Lonza Ltd.
Theodor Volker
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Substituted p,p'-methylene-bis-anilines
Patent number
4,950,792
Issue date
Aug 21, 1990
Lonza Ltd.
Hans Althaus
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...