Triglycerides as friction modifiers in engine oil for improved fuel economy
CA 2097029 C · Owner: The Lubrizol Corporation · Inventors: Dohner, Brent R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1. A friction modifier composition is disclosed that comprises an oil of lubricating viscosity and containing a friction-reducing amount of an additive comprising; (A) at least one natural oil comprising an animal oil or vegetable oil comprising a triglyceride of the formula (see Formula I), (A') a diglyceride of the formula (see Formula II, or II), wherein R1, R2 and R3 are independently saturated or unsaturated aliphatic hydrocarbyl groups containing from about 8 to about 24 carbon atoms and, (B) at least one metal overbased composition.
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 May 26, 1993 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 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.