Wholly aromatic mesomorphic polyester amide imides and the preparation thereof
CA 1268291 C · Owner: Basf Aktiengesellschaft · Inventors: Kock, Hans-Jakob; Hisgen, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are wholly aromatic mesomorphic polyester amide imides which form a liquid-crystalline fiberforming melt below 320°C and are composed of: a) from 5 to 35 mol% of repeat units of the formula (I) and/or (II):, (I), (II), where X can be identical or different each X being -O-, -S-, -SO2-, -CO-, -CH2- or =C(CH3)2 and n is 0 or 1, b) from 0 to 30 mol % of repeat units of the formulae (III) and/or (IV):, (III) , (IV), c) a molar amount corresponding to the total amount of components a) and b) of one or more of the repeat units (V), (VI), (VII), (VIII), (IX) or (X) in an amount of: c1) from 3 to 35 mol % of units of the formula (V): (V), c2) from 0 to 10 mol % of units of the formula …
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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 April 24, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.