Antitumour 1,5-diazaanthraquinones
CA 2345917 A1 · Owner: Menendez, Jose Carlos · Inventors: Garcia Gravalos, Dolores; Perez, Jose Maria; Blanco, Maria Del Mar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds having formula (I) wherein R3 R4, R7, and R8 are independently , selected from the group consisting of hydrogen lower alkyl, halogen, amine, mono(lower)alkylamine di(lower)alkylamine, phenyl, or substituted phenyl possess antitumour activity and are new with the exception of the compound in which R3, R4, R7, R8 are all hydrogen and the compound in which R3 and R7 are hydrogen, R4 is chlorine, and R8 is a 2-nitrophenyl group.
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 May 21, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2021.
- 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.