Thermoplastic thermosettable polyamides
CA 2054574 A1 · Owner: Huntsman Corporation · Inventors: Su, Wei-Yang; Champion, Donald H.; Speranza, George P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
THERMOPLASTIC THERMOSETTABLE POLYAMIDES (Docket No. 80,896-1-F), ABSTRACT OF THE DISCLOSURE Polyamide reaction products comprising: a dicarboxylic acid and a diamine component comprising a mixture of poly- (oxytetramethylene) diamines and oligomers of said poly(oxytetramethylene) diamines, said mixture containing from about 85 to about 99.5 wt.% of said poly(oxytetramethylene) diamines and correspondingly, from about 15 to about 0.5 wt.% of said oligomers, said poly(oxytetramethylene) diamines having the formula:, (I) , wherein n represents 0 or a positive number having a value of 1 to about 30, said oligomers having the formula: (II) , wherein n represents 0 or a positive number having a …
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
- Filed October 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2013.
- 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.