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Patents Grants
last 30 patents
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Patent Grant
Block copolymers based on polyphenylene ethers and polycondensates,...
Patent number
5,128,422
Issue date
Jul 7, 1992
Huels Aktiengesellschaft
Udo Kowalczik
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Patents Applications
last 30 patents
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Process for preparing 4-substituted 2,2,6,6-tetramethylpiperidin-N-...
Publication number
20050256312
Publication date
Nov 17, 2005
Degussa AG
Clemens Osterholt
C07 - ORGANIC CHEMISTRY
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Process for preparing acetals and ketals with the aid of multistage...
Publication number
20040024260
Publication date
Feb 5, 2004
Degussa AG
Hermann Winkler
C07 - ORGANIC CHEMISTRY