Overbased vegetable oils as additives for lubricants, plastics, paints, inks and greases
CA 2102098 C · Owner: Schroeck, Calvin W. · Inventors: Quinn, Robert E.; Barrer, Daniel E.; Nichols, Willis P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal overbased composition is disclosed that comprises (A) at least one natural oil comprising an animal oil or vegetable oil comprising a triglyoeride of formula (1) wherein R1 R2 and R3 are , independently saturated or unsaturated aliphatic hydrocarbyl groups containing from about 8 to about 24 carbon atoms and (B) a metal base oxide (MO), hydroxide (MOH) or alkoaida (R4OM) wherein the motel comprises an alkali or alkaline earth and R4 is a hydrocarbyl group containing from about 1 to about 24 carbon atoms, and wherein the equivalent ratio of (A):(B) is from 0.90-10:1 to form a saponified intermediate, adding 2-11 equivalents of (B) per equivalent of formed saponified intermediate …
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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 January 14, 1993 and granted May 13, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2015.
- 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.