Lubricating oil formulations
CA 2275835 C · Owner: Ozbalik, Nubar · Inventors: Gatto, Vincent James; Ozbalik, Nubar; Srinivasan, Sanjay
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lubricating oil compositions having excellent thermal and oxidative stability wear, control, copper corrosion control and compatibility with seal materials comprising a mineral oil, having a) a Viscosity Index of greater than 110 and an aniline point of greater than 110 °C and/or, b) a linear + single ring paraffin content of greater than 68 wt% and at , least one polymer, selected from olefin (co) polymer(s) polyalkyl (meth) acrylate(s) and , mixtures thereof. The lubricating oil compositions are particularly useful as manual transmission and axle lubricants.
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 21, 1999 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2021.
- 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.