Production of triazolinones
CA 2059531 C · Owner: Fmc Corporation · Inventors: Theodoridis, George; Lyga, John William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the production of an aryl triazolinone of the formula:, Formula I , in which, R is halogen alkyl, haloalkyl, cyanoalkyl, aryl-, alkyl alkoxyalkyl, alkylthio, alkylsulfinyl, alkylsulfonyl, alkylthioalkyl, alkylsulfinylalkyl alkyl-, sulfonylalkyl or phenyl, each X is independently H, halogen, lower alkyl, lower alkoxy, -NO2 -OH, -NHSO2R', -N(SO2R')2 or, -N(R')SO2R' where R' is lower alkyl and n is a number, from 1 to 3, by treating an aryl triazolidinone of the formula: Formula II , with a halogen of the group consisting of chlorine bromine and iodine, or a hypohalous acid of said halogen or a salt of said acid.
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 August 21, 1990 and granted October 5, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 2012.
- 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.