Fuel additive compositions containing a mannich condensation product, a poly(oxyalkylene) monool, and a carboxylic acid
CA 2414994 C · Owner: Gray, James A. · Inventors: Gray, James A.; Carabell, Kevin D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A fuel additive composition comprising: a) a Mannich condensation product of (1) a high molecular weight alkyl-substituted hydroxyaromatic compound (2) an amine having the formula:, (see above formula) wherein A is CH or nitrogen, R1, R2, R3 are independently hydrogen or lower alkyl of 1 to about 6 carbon atoms and each R2 and R3 is independently selected in each -CR2R3- unit and x , is an integer from 1 to about 6; and (3) an aldehyde, wherein the respective molar ratio of reactants (1), (2), and (3) is 1:0.1-2:0.1-2; b) a hydrocarbyl-terminated poly(oxyalkylene) monool; and c) a carboxylic acid as represented by the formula: R4(COOH)y, or anhydride thereof, wherein R4 represents a …
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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 19, 2002 and granted July 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2024.
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