Canadian application, no grantCanada
Process for preparing macrocyclic chelating agents and formation of chelates and conjugates thereof
CA 2117775 A1 · Owner: The Dow Chemical Company · Inventors: Litwinski, George R.; Kruper, William J. Jr.; Fordyce, William A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to an improved process for preparing macrocyclic chelating agents and for conjugating the macrocyclic chelating agents to biological molecules.
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
- Filed April 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 13, 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.
FiledApril 13, 1993
GrantedNo grant recorded
Term endedApril 13, 2013
Patent numberCA 2117775 A1
Classification (IPC)C07K16/00 +2 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.