Antitumor agents
CA 2296478 A1 · Owner: Yamada, Masashi · Inventors: Suma, Yukie; Iinuma, Munekazu; Yamada, Masashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antitumor agents containing as the active ingredient a compound selected from among pallidol, miyabenol A, miyabenol C .alpha.-viniferin, kobophenol A, 4,4-, (1,3-butadiene-1,4-diyl)bisphenol leachianol A, leachianol B, leachianol F leachianol G, hopeaphenol and davidiol A and salts thereof. Because of having excellent topoisomerase II inhibitory effects these compounds are usable as , antitumor agents.
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 July 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2020.
- 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.