Expired Canadian patentCanada
Method of producing ph3cb(c6f5)4
CA 2108512 C · Owner: Doellein, Guenther · Inventors: Doellein, Guenther
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing Ph3CB(C6F5)4 by reacting LiB(C6F5)4 with Ph3CCl which produces the desired product in an improved yield.
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 October 15, 1993 and granted June 16, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 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.
FiledOctober 15, 1993
GrantedJune 16, 1998
Term endedOctober 15, 2013
Patent numberCA 2108512 C
Classification (IPC)C07F5/02
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.