Carboxyalkenoic acids
CA 1238910 A · Owner: Shionogi & Co. Ltd. · Inventors: Hamashima, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound represented by the following formula: wherein R is aryl or an heterocyclic group; R1 is hydrogen or halogen; R2 is a single bond, alkylene or thiaalkylene; R3 is a hydrogen atom, salt forming atom or group or ester forming, group; and R6 is a hydrogen atom salt forming atom or group, or ester forming group and a process for producing this compound. These compounds are useful as intermediates for the production of anti-bacterial carboxyalkenamidocephalosporins.
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 July 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2005.
- 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.