Tricyclic penam compounds, their production and their use
CA 1292985 C · Owner: Noguchi, Noriyoshi · Inventors: Noguchi, Noriyoshi; Morimoto, Akira; Choh, Nobuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
24205-735, Abstract, Compounds having a 4,10-dioxo-3-oxa-7-thia-1-azatricyclo6,2,0,02'6decane-2-carboxylic acid skeleton as the base structure, their esters and their salts are useful, antibacterial agents. Preferred among such components are those having the formula:, wherein, R1 is H, NH2 or an organic residue bonded via carbon or nitrogen, R2 is H, -OCH3 or -NHCHO, R3 R4 and R5 independently are H or organic residue.
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
- Granted December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
- 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.