Cancerous metastasis inhibitors containing uracil derivatives
CA 2238331 C · Owner: Emura, Tomohiro · Inventors: Miyadera, Kazutaka; Emura, Tomohiro; Yamada, Yuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Drugs having an inhibitory activity on thymidine phosphorylases and inhibiting cancerous metastasis, which contain as the active ingredient uracil derivatives represented by general formula (1) or salts thereof wherein R1 , represents chlorine, bromine iodine, cyano or lower alkyl; and R2 represents an optionally substituted 4- to 8-membered heterocycle having nitrogen optionally substituted amidinothio, guanidino lower alkylamidino, amino, etc.
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 September 22, 1997 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2019.
- 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.