Substituted benzoxazinorifamycin derivative, process for preparing the same and antibacterial agent containing the same
CA 1293503 C · Owner: Yamane, Takehiko · Inventors: Hashizume, Takuji; Kanoo, Fumihiko; Yamashita, Katsuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rifamycin derivative having the formula (I): (I), wherein Rl is hydrogen atom, methyl group or ethyl group R2 is an alkyl group having 1 to 4 carbon atoms and A is, a group having the formula: in which n is an, integer of 3 to 5, or a group having the formula: in which R3 is an alkyl group having 1 to 5 carbon atoms; or a salt thereof. The rifamycin derivative (I) exhibits a strong antibacterial activity against Gram-positive bacteria and acid-fast bacteria, and also exhibits a strong antibacterial activity against tubercle bacilli.
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 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 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.