Lubricating oils of improved friction durability
CA 2227305 C · Owner: Exxonmobil Chemical Patents Inc. · Inventors: Nibert, Roger Keith; Watts, Raymond Frederick; Bloch, Ricardo Alfredo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The frictional durability of lubricating oils including power transmitting , fluids and in particular automatic transmission fluids are improved by , incorporating a combination of low potency friction modifiers ashless and/or , metal-containing antioxidants and oil-soluble phosphorus-containing compounds.
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
- Filed October 16, 1996 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2018.
- 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.