Wholly aromatic mesomorphic polyester imides, the preparation and use thereof
CA 1268588 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
Wholly aromatic mesomorphic polyester imides which form a liquid-crystalline fiber-forming melt below 320°C and are composed of:, a) from 5 to 35 mole % of repeat units of the formulae (I) and/or (II):, (I), (II), where x can be identical or different and each is -O- -S-, -SO2, -CO-, -CH2- or = C(CH3)2, and n is 1 or 2 b) from 0 to 30 mole % 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, c1) from 3 to 35 mole % of units of the formula (V): (V), and one or more of the repeat units of formula (VI) (VII) and (VIII) in the following molar amount: c2) from 2 to 25 mole % 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 May 1, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 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.