Acylated enol derivatives as prodrugs of elastase inhibitors
CA 2191844 C · Owner: Peet, Norton P. · Inventors: Mehdi, Shujaath; Peet, Norton P.; Burkhart, Joseph P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to acylated enol derivatives of known elastase inhibitors. These compounds are useful in the treatment of various inflammatory diseases, including cystic fibrosis and emphysema or as prodrugs of compounds which are useful in the treatment of said diseases.
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 May 8, 1995 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2017.
- 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.