Methods and compositions for reducing wear in internal combustion engines lubricated with a low phosphorous content borate-containing lubricating oil
CA 2442373 C · Owner: Chevron Oronite Company Llc · Inventors: Boffa, Alexander B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are methods and lubricant compositions for reducing wear in internal combustion engines lubricated with a low phosphorous content lubricating oil. The lubricant compositions of this invention comprise a synergistic combination of a dispersed hydrated, alkali metal borate and at, least one phosphorous-containing compound wherein the total phosphorous employed in the composition is no more than about 0.08 weight percent based on the total weight of the composition.
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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 September 24, 2003 and granted April 16, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 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.