Cephem compound, process for producing the compound, and pharmaceutical composition containing the same
CA 2123788 C · Owner: Taiho Pharmaceutical Co. Ltd. · Inventors: Hyodo, Akio; Akagi, Hiroshi; Hanaki, Hideaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the present invention is to provide a cephem compound having high activity against various pathogenic microorganisms. The cephem compound of this invention is represented by the general formula wherein Q represents CH or N; R1 represents a carboxylate etc; and R represents, the group or the group , where R2 represents a lower alkyl group etc n represents, an integer of 0 or 1 through 3 B- represents an anion, f is equal to 0 when R1 represents a carboxylate and 1 where R1 represents a carboxyl group, and the ring C represents a 5-membered heterocyclic group of not more than 4 nitrogen atoms, which may be substituted by lower alkyl,
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 16, 1993 and granted March 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2015.
- 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.