Distillate fuel composition containing combination of copper corrosion inhibitors
CA 2118618 C · Owner: Exxon Research And Engineering Company · Inventors: Poirier, Marc-Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A distillate fuel composition for reducing copper corrosion in fuel delivery systems and internal combustion engines which comprises a synergistic combination of (a) a 2,5-dihydrocarbyldithio-1,3,4-thiadiazole of the formula wherein R1 and R2 are independently R3S or H where R3 is a hydrocarbyl group containing from I to 16 carbon atoms with the proviso that at Least one of R1 and R2 is not hydrogen and (b) an adduct of tolyltriazole and a basic nitrogen compound selected from the group consisting of polyamines akoxyamines, aryloxyamines and monoalkyleneamines.
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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 March 9, 1994 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2016.
- 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.