Quinuclidine derivatives
CA 2102179 C · Owner: Shimada, Kaoru · Inventors: Kondo, Hiroshi; Shimada, Kaoru; Rosen, Terry J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (1), wherein R1 is methoxy and R2 is selected from the group consisting of methyl ethyl,isopropyil, sec-butyl and tert-butyl; and the pharmaceutically acceptable salts of such compounds. These compounds are substance P antagonists and useful in the treatment of gastrointestinal disorders inflammatory disorders, central nervous system disorders and pain.
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 April 28, 1992 and granted October 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2014.
- 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.