Bis(hydroxyphenyl)fluorene polyarylate polymers and alloys
CA 1254347 A · Owner: Chevron Research And Technology Company · Inventors: Parker, Phillip H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyarylate polymers derived from (A) mixtures of bis(hydroxyphenyl)fluorene compounds with anthracene bisphenols, and (B) a mixture of isophthalic and terephthalic acid. Also disclosed are polyarylate alloy compositions comprising a bis(hydroxyphenyl)fluorene polyarylate and a polymer resin selected from polybisphenol A carbonate and polystyrene. Certain polyarylate copolymers in accordance with the invention, derived from mixtures of bis(hydroxyphenyl)fluorene compounds with other bisphenols possess superior thermal properties. The bis(hydroxyphenyl)fluorene polyarylates also provide alloy compositions with polystyrene and bisphenol A carbonate that also exhibit excellent thermal …
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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 16, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 16, 2006.
- 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
Timeline From CIPO dates
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.