Poly(oxyalkylene) benzyl amine ethers and fuel compositions containing the same
CA 2224632 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 fuel additive having the formula:, (see fig. I) wherein R1 and R2 are independently hydrogen or lower alkyl; R3 and R4 are independently hydrogen or lower alkyl and each R3 and R4 is independently selected in each -O-CHR3-CHR4- unit; R5 is hydrogen alkyl having 1 to 100, carbon atoms, phenyl aralkyl having 7 to 100 carbon atoms or alkaryl having 7 to 100 carbon atoms, or an acyl group of the formula: (see fig. II), where R6 is alkyl having 1 to 30 carbon atoms phenyl, aralkyl having 7 to, 36 carbon atoms or alkaryl having 7 to 36 carbon atoms; n is an integer from 5 to 100; and x is an integer from 0 to 10.
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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 11, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2019.
- 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.