Expired Canadian patentCanada
Terpolyamides and multipolyamides containing amide units of 2-methylpentamethylenediamine and products prepared therefrom
CA 2097620 C · Owner: Invista Technologies S.A.R.L. · Inventors: Shridharani, Ketan G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyamides and polyamide fibers having a major proportion of hexamethyleneadipamide units and minor proportions of at least two other amide units, one of those other amide units being those of 2-methylpentamethylenediamine are disclosed.
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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
- Filed November 18, 1991 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 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.
FiledNovember 18, 1991
GrantedAugust 20, 2002
Term endedNovember 18, 2011
Patent numberCA 2097620 C
Classification (IPC)C08G69/26 +2 more
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.