Process for preparing alkali metal and alkaline earth metal complex greases
CA 2042196 A1 · Owner: Petro Canada · Inventors: Samman, Nicolas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RBP File No. 492-499, ABSTRACT, A process for preparing an alkali metal or alkaline earth metal complex soap for use in the preparation of an alkali metal or, alkaline earth metal complex grease is disclosed. An alkali metal or alkaline earth metal soap suitable as a precursor to the respective alkali metal or alkaline earth metal complex soap is reacted in the, presence of a base oil with a complexing amount of a complexing acid. The reaction produces the respective alkali metal or alkaline earth metal complex soap and fatty acid. A neutralizing amount of the, respective alkali metal or alkaline earth metal base is added to neutralize the fatty acid.
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 9, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 9, 2013.
- 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.