Lubricating oil composition
CA 1072111 A · Owner: Chevron Research And Technology Company · Inventors: De Vries, Louis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Oil-soluble nitrogen-containing compositions, useful as lubricating oil additives, are provided. These compositions are prepared by reacting: (a) an aryl ester of a hydrocarbyethylsulfonic acid; or (b) a hydrocarbylsulfonyl chloride with a nitrogen-containing compound containing at least one amine hydrogen i.e. -NH function. Also provided are processes for preparing these compositions and lubricating oil additive concentrates and lubricating oil compositions containing these compositions.
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 February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
- 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.