Lubricating oil composition comprising zinc dithiophosphates
CA 2428307 C · Owner: Hirano, Satoshi · Inventors: Hirano, Satoshi; Iwamoto, Shigeru; Nakazato, Morikuni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lubricating oil composition employable in combination with a low sulfur content fuel oil is preferably composed of a base oil having a sulfur content of at most 0.2 wt.% an ashless dispersant comprising an alkenyl- or alkyl- succinimide or a derivative thereof a metal-containing detergent containing an organic acid metal salt a zinc dialkyldithiophosphate, a zinc dialkylaryldithiophosphate and an oxidation inhibitor selected from the group consisting of a phenol compound an amine compound, and a molybdenum- containing compound wherein a ratio of the phosphorus content of the zinc dialkyldithiophosphate to the phosphorus content of the zinc dialkylaryldithiophosphate is in the range of …
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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 May 7, 2003 and granted March 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.