Method of removing hydroperoxides from lubricating oils
CA 2023927 C · Owner: Shaub, Harold · Inventors: Shaub, Harold; Dibenedetto, Arthur James; Brownawell, Darrell William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydroperoxides can be removed from a lubricating oil by contacting the oil with a heterogenous hydroperoxide decomposes. This extends the useful life of the oil and the equipment being lubricated. In a preferred embodiment, the hydroperoxide decomposes is incorporated on a substrate immobilized within the lubrication system of an internal combustion engine.
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 August 24, 1990 and granted June 20, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2012.
- 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.