Expired Canadian patentCanada
Lubricant compositions
CA 2015984 C · Owner: King, James P. · Inventors: King, James P.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lubricant composition having improved extreme pressure and antiwear properties comprising a base lubricant and an additive consisting of from about 0.01 to about 30 weight percent of said lubricant of a mixture of a metal thiosulfate and a metal phosphate.
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 May 3, 1990 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 3, 1990
GrantedAugust 15, 2000
Term endedMay 3, 2010
Patent numberCA 2015984 C
Classification (IPC)C10M125/06 +2 more
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.