2-hydroxy- and 2-acyloxy-4-morpholinyl anthracyclines
CA 2088979 A1 · Owner: Bargiotti, Alberto · Inventors: Faiardi, Daniela; Bargiotti, Alberto; Suarato, Antonino
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Anthracycline glycosides of formula (1) wherein R1 is hydrogen or methoxy group; R2 is hydrogen or hydroxy; both R3 and R4 represent hydrogen or one of R3 and R4 is hydroxy and the other of R3 and R4 represents hydrogen; R5 represents hydrogen atom or an acyl residue -COX in which X is a C1-C8 linear or branched alkyl chain, an aryl, an aryl lower alkyl or a 5- or , 6-membered heteroaromatic group are anti-tumour 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 August 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2013.
- 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.