Melt processable, liquid crystalline polyesters
CA 1321672 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Jackson, Winston Jerome, Jr.; Fagerburg, David Richard; Martin, Mary Elizabeth Beard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A high use temperature wholly aromatic polyester resin, comprising, i) a diacid component comprising 2,6-naphthalenedicarboxylic acid (N) and terephthalic acid (T) monomer units, wherein the ratio N:T is from about 0.25 to about 4.0, ii) an aromatic diol component, comprising 4,4'-dihydroxybiphenyl monomer units, and iii) 10-80 mole percent p-hydroxybenzoic acid monomer units, based on the total monomer units. LE0613F
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 August 24, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 24, 2010.
- 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.