Lubricants and functional fluids containing polyfunctional nitriles
CA 1073441 A · Owner: The Lubrizol Corporation · Inventors: Hoke, Donald I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: LUBRICANTS AND FUNCTIONAL FLUIDS CONTAINING POLYFUNCTIONAL NITRILES, Inventor: Donald Irvin Hoke Abstract of the Disclosure:, Compositions useful as lubricants and functional fluids comprise an oleaginous liquid of lubricating viscosity, typically a mineral oil, and an oxygensulfur-, or nitrogen-containing polyfunctional nitrile. The preferred nitriles are cyanoethylation products of alcohols mercaptans and amines, and especially of alcohols. The polyfunctional nitrile serves as a seal swelling agent and/or demulsifier.
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 March 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 11, 1997.
- 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.