Anthracycline glycosides
CA 1248944 A · Owner: Hoffmann-La Roche Limited/Hoffmann-La Roche Limitee · Inventors: Broadhurst, Michael J.; Hassall, Cedric H.; Thomas, Gareth J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides compounds of the formula I, wherein R represents a hydrogen atom a, lower alkyl, aryl or aryl-(lower alkyl) group, a 5-membered or 6-membered heteroaromatic group in which the hetero atom is nitrogen, oxygen or sulphur or a group of the formula, -(CH2)n-COR', or, (b), R' represents a hydroxy lower alkoxy, amino, lower alkylamino, di-(lower alkyl)amino or arylamino group n stands for an integer of 1 to 4, n' stands for an, integer of 2 to 10 R1 and R2 each repre-, sent a hydrogen atom or one of R1 and R2 represents a hydrogen atom and the other represents a hydroxy, lower alkoxy or, benzyloxy group and X represents a group of the formula, -CH2- , or -CH2-CH2-, (i) …
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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
- Granted January 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
- 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.