Imidazolone derivatives for the treatment of viral diseases
CA 2428461 A1 · Owner: Parratt, Martin John · Inventors: Parkes, Kevin Edward Burdon; Dymock, Brian William; Jones, Philip Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention describes novel imidazolone derivatives as well as hydrolyzable esters or ethers of compounds of formula I and pharmaceutically acceptable salts thereof, a process for their manufacture pharmaceutical compositions , and the use of such compounds in medicine (formula I) wherein R1 R2, R3, A , and X are as defined in the description. The compounds of formula I are the human immunodeficiency virus reverse transcriptase enzyme which is involved in viral replication. Consequently the compounds of this invention may be advantageously used as therapeutic agents for HIV madiated process.
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 12, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2023.
- 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.