Compositions, concentrates, lubricant compositions, fuel composition and methods for improving fuel economy of internal combustion engines
CA 1281706 C · Owner: Walsh, Reed H. · Inventors: Walsh, Reed H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Succinimide derivatives represented by the formula: wherein X is selected from the group consisting of M (I), (III), wherein R is a hydrocarbon-based group containing from about 8 up to about 35 carbon atoms, R1 and R2 are each independently hydrogen or an alkyl group containing up to 8 carbon atoms; R4 is a hydrocarbon-based group containing up to about 28 carbon atoms: R4 and R5 are each independently hydrogen or a hydrocarbon-based group containing up to about 25 carbon atoms; and M is a metal cation.
Read the whole patent
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
- Granted March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2008.
- 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.