Liquid crystal copolyesters
CA 1189241 A · Owner: Deex, Oliver D. · Inventors: Deex, Oliver D.
Overview
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, hydroquinone a C8, to C12 linear aliphatic dicarboxylic acid and optionally an aromatic dicarboxylic acid selected from the group consisting of isophthalic acid, terephthalic acid, 1,5 naphthalene dicarboxylic acid and 2,6-naphthalene dicarboxylic acid.
Read the whole patent
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.
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.