Canadian application, no grantCanada
Novel cyanophosphonate derivatives and method for their preparation
CA 2276159 A1 · Owner: Lennon, Patrick J. · Inventors: Lennon, Patrick J.; Vulfson, Sergey G.
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 novel cyanophosphonate compounds of the present invention include cyanophosphonate salts, cyanophosphonate monoacid salts cyanophosphonate , monoacid esters, cyanophosphonate monoester salts and cyanophosphonate methylester salts.
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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 December 23, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 23, 1997
GrantedNo grant recorded
Term endedDecember 23, 2017
Patent numberCA 2276159 A1
Classification (IPC)C07F9/38 +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.