Hydrocarbyl cephem compounds
CA 1068258 A · Owner: Shionogi And Co. · Inventors: Sendo, Yuji; Murakami, Masayuki; Yoshioka, Mitsuru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antibacterial cephalosporins of the formula wherein Acyl is an acyl group: R is a hydrogen or methoxy R is a, hydrocarbyl group containing 1 to 8 carbon atoms: R is a hydrogen alkali metal, alkaline earth metal, halo-alkaline earth metal group or acyl group containing 1 to 12 carbon atoms; R3 is a hydrogen, pharmaceutically acceptable cation or ester residue; or when, R2 and R3 are both hydrogens they can be combined to form a lac-, tone ring the broken line shows a double bond at position 2 or 3; and n is zero or one, and processes for preparing them by the reaction of the compound shown by above formula in which R1 and R2 combined to show a bond, with a Grignard type or organometallic …
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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 December 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 18, 1996.
- 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.