Substituted-acyclic terpene compound
CA 2045695 A1 · Owner: Mitsubishi Chemical Corporation · Inventors: Morinaka, Yasuhiro; Takayanagi, Hisao; Kitano, Yasunori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Acyclic terpene compounds useful as intermediates for producing sarcophytol A which have an anti-carcinogenic promotor activity and anti-tumor activity which compounds, are shown by the general formula (I): (I), wherein R is a group of formula:, or (wherein R1 is cyano group or formyl group; R2 is a hydrogen atom or -CO2R3; R3 is C1 - C4 alkyl group; R4 is -C?CH or -CH=CH2 ); X is a hydrogen atom, hydroxyl group a halogen, atom, or a group of formula: -OR5 or -OSO2R6 (wherein R5 is a hydrogen atom, 1-alkoxyalkyl group tetrahydrofuryl group, tetrahydropyranyl group or acyl group, silyl group substituted with C1 - C5 alkyl group or phenyl group; R6 is C1 - C4 …
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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 29, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 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.