Antibacterial agents
CA 2058822 C · Owner: Ternansky, Robert J. · Inventors: Ternansky, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides cephalosporins of the following general formula:, (see formula I) wherein R is hydrogen, C1-C6 alkyl, C2-C6 alkenyl C2-C6 alkynyl, C3-C6 cycloalkyl, or C1-C6 haloalkyl; A and A' are taken together to form a group of the formula, (see formula II), wherein X is hydrogen halo, C1-C6 alkyl, -C1-C6, alkoxy, C1-C6 alkoxycarbonyl amino, nitro, or carboxy;, and Y is nitrogen; and pharmaceutically acceptable salts thereof. These compounds are useful as antibacterial agents. Also provided by the invention are pharmaceutical formulations incorporating a compound of the above formula as the active ingredient and the use, of such compounds as antibiotics.
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 January 6, 1992 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 2014.
- 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.