Method for working metal and lubricants for use therein
CA 1053654 A · Owner: The Lubrizol Corporation · Inventors: Jahnke, Richard W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lubricants useful in metal working processes especially drawing, comprise an oil of lubricating viscosity; a carboxylic acid or derivative thereof especially an anhydride of a hydrocarbon-substituted succinic acid in which the substituent contains about 6-30 carbon atoms; and a phosphorus acid salt usually a, zinc salt of a phosphorodithioic acid. The lubricant may also contain other ingredients such as chlorinated wax. Said lubricant provides improved lubricity corrosion, resistance, cleanability, anti-wear properties and extreme pressure properties when used in the working operation.
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 May 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1996.
- 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.