Lubricating oil composition
CA 1286651 C · Owner: Idemitsu Kosan Co. Ltd. · Inventors: Seiki, Hiromichi
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 lubricating oil composition comprising 97 to 60% by weight of mineral oil and 3 to 40% by weight of polyester, said mineral oil having a dynamic viscosity at 100°C of 2 to 50 centistokes, a pour point (as determined by JIS K-2269) of not more than -30°C, and a viscosity index (as determined by JIS K-2283) of not less than 70. This lubricating oil composition is suitable for lubrication of parts including a wet brake and a wet clutch, such as automatic transmissions and tractors. The lubricating oil composition of the present invention has a suitable viscosity at high temperatures and further is low in low temperature viscosity. Furthermore the lubricating …
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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
- Granted July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 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.