3-aminoquinazolin-2,4-dione antibacterial agents
CA 2393802 C · Owner: Stier, Michael Andrew · Inventors: Sanchez, Joseph Peter; Yip, Judy; Bird, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antibacterial 3-aminoquinazolin-2,4-diones have formula (I) wherein: R1 and R3 include alkyl, alkenyl, alkynyl, cycloalkyl aryl, heterocyclic, and , heteroaryl; R5 R6, and R8 include H, alkyl, alkoxy, halo NO2, CN, NH2, alkyl , and dialkylamino; R7 includes hydrogen alkyl, cycloalkyl, heterocyclic, fused heterocyclic, aryl and fused aryl; J and K are C or N; and pharmaceutically acceptable salts thereof.
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 December 12, 2000 and granted April 19, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2022.
- 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.