Aromatic copolyether amide which can be processed as a thermoplastic, process for its preparation, and its use for the production of moldings
CA 1338649 C · Owner: Arteva Technologies S.A.R.L. · Inventors: Hess, Reiner; Herold, Friedrich; Deckers, Hellmuth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Aromatic copolyether amide which can be processed as a thermoplastic, process for its preparation and its use for the production of moldings, The structure of the aromatic copolyether amide which can be processed as a thermoplastic comprises recurring units of the formulae -CO-Ar1-CO- (A), -NH-Ar1-O-Ar1-X-Ar1-O-Ar1- NH (B) and -NH-Ar2-NH- (C) in which Ar1 denotes a divalent, unsubstituted or substituted aromatic radical having 6 carbon atoms which is linked in the p-position X represents a 2,2-propylidene link and Ar2 is identical with Ar1 or is Ar1 which is linked in the m-position or, is the -Ar1-Z-Ar1- group in which Z is a direct bond or is a radical -CH2-, -C(CH3) 2-, -SO2-, -CO- -O-, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 15, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2013.
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