3-(heteroaryl acetamido)-2-oxo-azetidine-1-sulfonic acids derivatives as antibacterial agents
CA 2422375 C · Owner: Singh, Rajeshwar · Inventors: Reddy, Andhe V. Narender; Micetich, Ronald George; Salama, Sameeh M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to novel Syn isomers of racemates and optical isomers of 3-(heteroaryl acetamido)-2-oxo-azetidine-1-sulfonic acids of formula (I) and its use in treating the infections caused by gram-negative pathogenic bacteria.
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 September 14, 2001 and granted March 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 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.