Combination of a low ash lubricating oil composition and low sulfur fuel
CA 2440797 A1 · Owner: Infineum International Limited · Inventors: Arrowsmith, Stephen; Brown, Alisdair J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lubricating oil composition for use in an internal combustion engine operated, with a fuel having a sulphur content of less than 50 ppm that contains a , minor, amount of at least one metal-containing detergent which lubricating oil , composition, when formulated for use in a diesel engine has a total ash content of less than 1.0 wt. %, and when formulated for use in a gasoline engine has a total ash content of less, than 0.7 wt. %.
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 September 12, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 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.
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.