Expired Canadian patentCanada
Liquid crystal copolyesters
CA 1189242 A · Owner: Monsanto Company · Inventors: Deex, Oliver D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are liquid crystal copolyesters prepared from p-hydroxybenzoic acid, isophthalic acid hydroquinone and 2,2-bis(4-hydroxyphenyl) propane.
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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 June 18, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 3, 1983
GrantedJune 18, 1985
Term endedJune 18, 2002
Patent numberCA 1189242 A
Classification (IPC)C08G63/60
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.