Aminocarbamates of polyalkyl or polyalkenyl n-hydroxyalkyl succinimdes and fuel compositions containing the same
CA 2280226 A1 · Owner: Chevron Chemical Company · Inventors: Cherpeck, Richard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aminocarbamates of polyalkyl or polyalkenyl N-hydroxyalkyl succinimides having the, formula:, or a fuel soluble salt thereof; wherein R is a polyalkyl or polyalkenyl group having an average molecular weight in the, range of about 450 to about 5,000; n is an integer from 2 to 5; and, A is a polyamine moiety having at least one basic nitrogen atom wherein the, polyamine is connected to he carbonyl group through one of its nitrogen atoms to, form a carbamate linkage. The compounds of formula I are useful as fuel additives for the prevention and control of engine deposits.
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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 August 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 2021.
- 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
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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.