Fuel compositions containing polyamines of poly(oxyalkylene) aromatic esters
CA 2255506 A1 · Owner: Cherpeck, Richard E. · Inventors: Cherpeck, Richard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyamine-containing poly(oxyalkylene) aromatic ester having the formula: (see fig. I), or a fuel-soluble salt thereof; where R1 is a polyamine moiety having about 2 to about 12 amine nitrogen atoms and about 2 to about 40 carbon atoms wherein the polyamine moiety is, connected to the aromatic ring through one of its amine nitrogen atoms R2 and, R3 are independently hydrogen or lower alkyl and each R2 and R3 is independently selected in each ~O~CHR2~CHR3~unit; R4 is hydrogen alkyl, having 1 to about 100 carbon atoms phenyl, aralkyl having about 7 to about 100 carbon atoms or alkaryl having about 7 to about 100 carbon atoms or an acyl, group of the formula:, (see fig. II) where R5 is alkyl …
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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 9, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 9, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2020.
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Timeline
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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.