Surfactants derived from di- or tri-carboxylic hydroxy-acids
CA 1296332 C · Owner: Raffineria Olii Lubrificanti "R.O.L." S.P.A. · Inventors: Fornara, Dario; Turchini, Luigi; Albanini, Aurelio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
SURFACTANTS DERIVED FROM DI- OR TRI-CARBOXYLIC HYDROXY-ACIDS (CASE V.3545), ABSTRACT OF THE DISCLOSURE Surfactants consisting of esters of di- or tri-carboxylic hydroxyacids having the formula: wherein:, X = H, -CH2COOR;, Y = H, OH, with the proviso that Y=H when X = -CH2COOR; R, R1, R2, which may be the same or different are H an, alkali or alkaline-earth metal -NH4, a cation of an, ammonium organic base or an A radical selected from the group consisting of etherified (C6-C16) alkyl polysaccharides containing from 2 to 6 saccharide units and etherified (C6-C16) hydroxyalkyl aliphatic polyalcohols containing from 2 to 16 hydroxyl groups;, and wherein at least one of said R R1, R2 is an 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
- Granted February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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
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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.