Lubricant compositions
CA 2000762 C · Owner: Novartis Ag · Inventors: O'Neil, Robert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides lubricant compositions comprising a lubricant base and, as metal deactivator and/or antioxidant, at least one compound having the formula (I): wherein, R2 is C1-C12 straight or branched chain alkyl; and R3 is C1-C12 straight or branched chain alkyl interrupted by one or more O-atoms or R3 is C5-C12cycloalkyl.
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, 1989 and granted December 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2011.
- 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.