Alkenylphenoxyimide modified polyimide
CA 2006609 A1 · Owner: Stenzenberger, Horst · Inventors: Koenig, Peter; Stenzenberger, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Curable compositions, characterized in that they contain (a) polyimides of the general formula (I) (I), wherein B represents a divalent moiety containing a carbon-carbon double bond, and wherein A represents an X-valent but at least, divalent, moiety, (b) alkenylphenoximides of the general formula (II) (II), wherein D reprepresents a Y-valent moiety Y being 1, 2 or 3, and, wherein E denotes a moiety having the following formulae wherein R represents an alkyl group with 1 to 6 carbon atoms and R' represents a 1,2- or 2,3-alkenyl group with 3 to 8 carbon atoms. CS5/T1135FF
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 December 22, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.