Carboxylic ester lubricant compositions compatible with hydrofluorocar bon refrigerants
CA 2015204 C · Owner: Jolley, Scott T. · Inventors: Jolley, Scott T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid composition is described which comprises, (A) a major amount of at least one fluorine containing hydrocarbon containing one or two carbon atoms; and, (B) a minor amount of at least one soluble organic lubricant comprising at least one carboxylic ester of a polyhydroxy compound containing at least 2 hydroxy groups and characterized by the general formula ROC(O)R1n (I), wherein R is a hydrocarbyl group each R1 is independently, hydrogen, a straight chain lower hydrocarbyl group, a branched chain hydrocarbyl group or a straight, chain hydrocarbyl group containing from 8 to about 22 carbon atoms provided that at least one R1 group is hydrogen, a lower straight chain hydrocarbyl or a …
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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 April 23, 1990 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.