Heterocyclic esters of rapamycin and pharmaceutical compositions containing them
CA 2176961 A1 · Owner: Schiehser, Guy A. · Inventors: Schiehser, Guy A.; Nelson, Frances C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of structure (I), wherein R and R1 are each independently, (a) or , hydrogen; R2 is a heterocyclic radical which may be optionally substituted; n = 0-6; with the proviso that R and R1 are both not hydrogen or a , pharmaceutically acceptable salt thereof which is useful as an immunosuppressive, antiinflammatory, antifungal antiproliferative, and , antitumor agent.
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 November 16, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2016.
- 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.