Method for controlling engine deposits in a direct injection spark ignition gasoline engine
CA 2372527 C · Owner: Ahmadi, Majid R. · Inventors: Ahmadi, Majid R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for controlling engine deposits in a direct injection spark ignition gasoline , engine which comprises operating the engine with a fuel composition comprising a , major amount of hydrocarbons boiling in the gasoline range and an effective deposit-controlling amount of a fuel additive composition comprising: (a) an aromatic ester compound of the formula: (see above formula) , or a fuel soluble salt thereof wherein R is hydroxy, nitro or, -(CH2)x-NR5R6 wherein R5 and R6 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms and x is 0 or 1; R1 is hydrogen hydroxy, nitro or , -NR7R8, wherein R7 and R8 are independently hydrogen or lower alkyl having 1 to 6 carbon …
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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 February 18, 2002 and granted January 4, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2024.
- 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.