Expired Canadian patentCanada
Method for solubilizing a benzotriazole with a thiadiazole
CA 2237725 C · Owner: Exxonmobil Chemical Patents Inc. · Inventors: Clarke, Dean Bedford; Carroll, Dale Robert
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 homogenous product is formed by heating at a temperature in the range of from 50~ to 150 ~C a mixture of a benzotriazole and a 2,5-dihydrocarbyldithio- 1,3,4-thiadiazole.
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 December 12, 1996 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2018.
- 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 12, 1996
GrantedSeptember 16, 2003
Term endedDecember 12, 2016
Patent numberCA 2237725 C
Classification (IPC)C10M141/08 +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.