Cephalosporin antibiotics
CA 1136616 A · Owner: Glaxo Group Limited · Inventors: Ayres, Barry E.; Livermore, David G.H.; Newall, Christopher E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cephalosporin antibiotics of general formula (I), (wherein Ra and Rb, which may be the same or different, each represent a C1-4 alkyl group or together, with the carbon atom to which they are attached form a C3-7 cycloalkylidene group and R1 represents a C1-4alkyl group) exhibit broad spectrum antibiotic activity, the activity being unusually high against gram-negative organisms such as strains of Pseudomonas organisms. Particularly effective compounds of formula (I) are (6R,7R)-7-(Z)-2-(2-aminothiazol-4-yl)-2-(2carboxyprop-2-oxyimino)acetamido-3-(2-methylpyrazolium-l-ylmethyl)ceph-3-em-4-carboxylate and …
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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 November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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.