Thermoplastic carbonate-modified copolyesters and a process for their preparation
CA 1068849 A · Owner: Bayer Aktiengesellschaft · Inventors: Vernaleken, Hugo; Binsack, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermoplastic carbonate-modified copolyesters and a process for their preparation, Abstract of Disclosure Carbonate-modified copolyesters which are suitable for the production of mouldings by injection moulding or for the production of pipes, films and fibres by extrusion, can be obtained by reacting aromatic dicarboxylic acids or their ester-forming derivatives and carbonic acid esters of dihydric aliphatic alcohols which have carbonic acid ester groupings in the molecule and hydroxyalkyl end groups.
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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 December 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 25, 1996.
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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.