Automotive lubricant
CA 2129657 C · Owner: Steigerwald, Edgard A. · Inventors: Bouffet, Alain G.; Alves, Dominique; Ostyn, Marcel A. J. O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automotive lubricant comprising a white oil basestock and one or more additives, at least one additive being an antioxidant. The white oil basestock may be blended with mineral ail and/or synthetic oil basestocks. The lubricant can be used for ex-, ample, as an engine oil, gear oil or automatic transmission fluid.
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 February 1, 1993 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2015.
- 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.