Gear oil having low copper corrosion properties
CA 2464974 C · Owner: Chevron Oronite Company Llc · Inventors: Buitrago, Juan A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gear oil additive composition and gear oil composition comprising a organic polysulfide having at least 30 wt % of a dialkyl polysulfide compound or mixture , of dialkyl polysulfide compounds a thiadiazole; and at least one ashless phosphorus-containing wear inhibitor compound is disclosed as having low yellow corrosion in axles and transmissions.
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 April 21, 2004 and granted October 6, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 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
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.