Metalworking lubricant composition
CA 1114358 A · Owner: Imperial Oil Limited · Inventors: Norton, James H.; Campbell, Ian D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metalworking lubricant composition which is particularly effective in high-temperature forging operations comprising a major amount of a naphthenic base oil which includes at least about 20 weight % of reduced naphthenic crude oil and preferably a minor amount of an additive which is either a zinc dihydrocarbyl dithiophosphate or a selected sulfur containing compound.
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 December 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1998.
- 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.