Mesogenic cyanate functional maleimides and thermosets thereof
CA 2021289 A1 · Owner: Earls, Jimmy D. · Inventors: Earls, Jimmy D.; Hefner, Robert E. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds containing at least one cyanate group, at least one maleimide group and at least one mesogenic or rodlike moiety are prepared by reacting one or more aminophenols containing one or more mesogenic or rodlike moieties with a stoichiometric quantity of a maleic anhydride per amine group of said aminophenol and then cyanating the resulting phenolic functional maleimide. 37,976-F
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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 July 16, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 2012.
- 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.