Medium speed diesel engine lubricating oils
CA 1303599 C · Owner: Afton Chemical Intangibles Llc · Inventors: Hutchison, David Alan; Stauffer, Richard Darrell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention, There is provided a lubricating oil composition for use in medium speed diesel engines, such as railroad locomotive diesel engines. This lubricating oil composition comprises an oil of lubricating viscosity and a minor amount of a reaction product that is obtained by reacting an alkyl-substituted dicarboxylic acid compound selected from the group consisting of alkyl-substituted dicarboxylic acids, alkyl-substituted dicarboxylic acid anhydrides, and mixtures thereof with a basic salt of aminoguanidine under selected conditions that will provide a product rich in alkyl bis-3-amino-1,2,4-triazole.
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
- Granted June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 2009.
- 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.