Oxepane isomers of rapamycin useful as immunosuppressive agents
CA 2086643 C · Owner: American Home Products Corporation · Inventors: Hughes, Philip F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A derivative of rapamycin of general formula (I) (see formula I), wherein R1 and R2 are selected from the group consisting of hydrogen acyl, sulfonyl, or alkyl or a pharmaceutically acceptable salt thereof which is by virtue of , its, immunosuppressive activity is useful in treating transplantation rejection host vs. graft, disease, autoimmune diseases and diseases of inflammation.
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 January 4, 1993 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2015.
- 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.