Lubricant additives
CA 1066270 A · Owner: Ethyl Cooper Limited · Inventors: Askew, Herbert F.; Jayne, Gerald J.J.; Elliott, John S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for preparing a normally liquid oil-, soluble, metal-free, phosphorus-free substance by reacting a dimer of cyclopentadiene or methylcyclopentadiene with sulfur. The reaction is carried out in the absence of a solvent or in the presence of a non-polar solvent and the amount of sulfur reacted is from 0.1 to 4 moles per mole of said dimer. The sulfurized product is useful as a lubricant additive.
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 November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 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.