Esters of fatty acids, which may be quaternized, from oxalkylated alkylalkylenediamines
CA 1310632 C · Owner: Hoechst Aktiengesellschaft · Inventors: Hofinger, Manfred; Mitzlaff, Michael; Wolter, Dietrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fatty acid esters of oxalkylated alkylalkylenediamines which may be quaternized, Esters of oxalkylated alkylalkylenediamines which may, be quaternized, of the formula where the individual symbols have the meaning given in the description, process for their production and their use as corrosion inhibitors, particularly in crude oil recovery plants and crude oil treatment plants.
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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 November 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 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.