Unsulfurized, carboxylate-containing additive for lubrication oils
CA 2467640 C · Owner: Boons, Cornelis Hendrikus Maria · Inventors: Boons, Cornelis Hendrikus Maria; Spala, Eugene; Van Dam, Willem
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a novel unsulfurized carboxylate-containing , additive for lubricating oils comprising a mixture of alkaline earth metal salts , (hydrocarbyl phenate/hydrocarbyl salicylate) and a reduced amount of unreacted hydrocarbyl phenols, as well as additive packages concentrates , and finished oil compositions comprising the same. Specifically it relates to , additives comprising said mixture in which said hydrocarbyl salicylate is primarily single-aromatic-ring hydrocarbyl salicylate. The invention also provides a method for producing said additive.
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
- Filed May 19, 2004 and granted March 31, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2026.
- 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.