Preparation of lithium-calcium grease compositions
CA 2038759 A1 · Owner: Eisenstein, Stephen E. · Inventors: Kuchler, Wayne J.; Eisenstein, Stephen E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a process for the preparation of a lubricating grease which comprises (a) dispersing in a major amount of a lubricating oil at a temperature in the range 180 to 200°F (82 to 93°C) an effective amount of a saponifiable fatty material and lithium base to neutralize the fatty material, (b) then heating the resulting mixture from (a) a temperature in the range 385 to 410°F (196 to 210°C) at ambient pressure to dissolve said fatty material, (c) homogenizing the resulting mixture from (b) a pressure in the range 80 to 200 psi (552 x 103 to 1379 kx 103 Pa) while maintaining the temperature (d) cooling the resulting mixture to a temperature below 370°F (188°C) (e) adding …
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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 March 21, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 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.