Metal hydroxide desiccated emulsions used to prepare grease
CA 2500968 C · Owner: The Lubrizol Corporation · Inventors: Greenfield, Paul S.; Hollingshurst, Claire L.; Kernizan, Carl F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a grease composition comprising a reaction product of a stable dispersion of a metal hydroxide with a number average particle size in the range 20 nanometres to 2 micrometres a surfactant with a HLB of less than , 10 a mono- and/or poly- carboxylic acid, and an oil of lubricating viscosity. The method of preparing a grease composition is also disclosed with benefits including a reduction in reaction time amount of foam produced and , environmental hazards.
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 August 14, 2003 and granted March 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 2025.
- 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.