A method of dyeing a substrate with a reactive dyestuff in supercritical or near supercritical carbon dioxide
CA 2586450 C · Owner: Woerlee, Geert Feye · Inventors: Fernandez Cid, Maria Vanesa; Witkamp, Geert Jan; Teesink-Gerstner, Kathryn Nicole
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of dyeing a substrate with a reactive dyestuff in supercritical or near supercritical carbon dioxide said , substrate being selected from the group consisting of cellulose fibres modified cellulose fibres, protein fibres and of synthetic fibres or any , combination thereof, wherein the method comprises the subsequent steps of: pretreating the substrate by wetting the substrate with a fluid medium containing at least 10 wt.%, preferably at least 40 wt.% of one or more organic hydrogen bond acceptor compounds selected from the group consisting of C1-C6 alkano ls dimethyl sulfoxide, dimethylformamide, acetone butan-2-one, dimethyl ether, methyl …
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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 November 4, 2005 and granted October 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.