Anthracycline compounds having anti-tumour activity, novel intermediates for the preparation of these anthracycline compounds, as well as compositions containing said active anthracycline compounds
CA 2048510 A1 · Owner: De Bie, Joannes F. M. · Inventors: De Vos, Dirk; Scheeren, Johan W.; De Bie, Joannes F. M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Can, ABSTRACT, This invention provides novel anti-tumour compounds of the formula wherein R1 and R2 axe hydrogen or together form an alkylalkoxy- or, OH-substituted aromatic group which optionally contains an N atom as a hetero-atom; R is -OOCH3 or -C=C-R4 and R4 is H or trimethylsilyl; and R3 is H or -COCF3; and acid addition salts thereof; as well as compositions containing these compounds.
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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
- Filed August 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 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.