Expired Canadian patentCanada
The preparation of an ester of penicilling.
CA 1339620 C · Owner: Tyson, Robert Graham · Inventors: Palmer, Derek Reginald; Tyson, Robert Graham
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved methods for the preparation of 1ethoxycarbonyloxyethyl ester of penicillin-G in which alphabromodiethylcarbonate is used as a reactant.
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 January 6, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 6, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 28, 1983
GrantedJanuary 6, 1998
Term endedJanuary 6, 2015
Patent numberCA 1339620 C
Classification (IPC)C07D499/08 +1 more
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.