Methods for preparing macrocyclic analogs and intermediates for preparing same
CA 2632433 C · Owner: Seletsky, Boris M. · Inventors: Zheng, Wanjun; Seletsky, Boris M.; Yu, Melvin J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for the preparation of macrocyclic compound of , chemical formula:, (see formula B1939) from (see formula I) and (see formula II). The invention also relates to novel intermediates used in the preparation of compound B1939.
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 June 16, 1999 and granted February 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2021.
- 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.