Two-cycle engine oil formed from a blend of a complex alcohol ester and other basestocks
CA 2263087 A1 · Owner: Turner, David W. · Inventors: Turner, David W.; Duncan, Carolyn B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A biodegradable two-cycle lubricant which is prepared from an add mixture of: (1) a biodegradable lubricating oil comprising an add mixture of the following components: a complex alcohol ester basestock which comprises the reaction product of an add mixture of the following: a polyhydroxyl compound represented by the general formula R(OH)n wherein R is any aliphatic or cycloaliphatic hydrocarbyl group and n is at least 2 provided that the hydrocarbyl , group contains from about 2 to 20 carbon atoms; a polybasic acid or an anhydride of a polybasic acid, provided that the ratio of equivalents of the polybasic acid to equivalents of alcohol from the polyhydroxyl compound is in the range …
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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 September 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2019.
- 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.