Transmission lubricating compositions with improved performance, containing acid/polyamine condensation product
CA 2532964 C · Owner: Smoggie, John C. · Inventors: Tipton, Craig; Sumiejski, James L.; Smoggie, John C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lubricating composition comprises (a) an alkyl phosphite wherein the , alkyl group contains 14 to 20 carbon atoms; (b) a condensation product of a fatty acid with a polyamine or an alkylenepolyamine; (c) a borate ester; (d) a borated dispersant; and (e) an oil of lubricating viscosity. The lubricating composition has improved wear resistance and further provides anti-shudder , properties and appropriate friction properties. The lubricating composition can , be used in automatic transmission fluids.
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 June 29, 2004 and granted September 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 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.