Lubricating oil compositions containing novel combination of stabilizers
CA 1248516 A · Owner: Petro-Canada Inc. · Inventors: Cohen, Stephen C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lubricant compositions are disclosed in which a synergistic combination of low-volatility tri-substituted phosphite and low-volatility sterically hindered phenolic stabilizers provide surprisingly effective antioxidant qualities to lubricating oils selected from hydrotreated oils poly-alpha-olefin, oils and paraffinic white oils and mixtures thereof.
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 January 10, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 10, 2006.
- 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.