Lubricating oil composition which decreases copper corrosion and method of making same
CA 2464456 C · Owner: Buitrago, Juan Alberto · Inventors: Buitrago, Juan Alberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil-soluble additive composition and lubricating oil composition containing the same comprising an organic sulfur-containing extreme pressure additive; a thiadiazole wherein the thiadiazole does not contain a polycarboxylate moiety and the amount of dimercaptothiadiazole is from about 0.1 wt% to about 10 wt%; an amino phosphorus compound; and an alkyl or alkenyl succinic anhydride used to reduce the corrosion of yellow metal components which are present in axles and transmissions.
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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 April 14, 2004 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 14, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2026.
- 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
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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.