Carbapenem process
CA 1284324 C · Owner: Dextraze, Pierre · Inventors: Dextraze, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a new and more efficient process for producing carbapenem antibiotic derivatives having a 2substituent of the general formula, S-A-R14 wherein A represents cyclopentylene, cyclohexylene or C2-C6 alkylene optionally substituted by one or more C1-C4 alkyl groups and R14 represents a quaternized nitrogen-containing aromatic or non-aromatic heterocycle attached to A through a quaternary nitrogen atom.
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 May 21, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 21, 2008.
- 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.