Process for dyeing natural or synthetic polyamide fibre materials with 1:1 metal complex dyes
CA 1302017 C · Owner: Mosimann, Walter · Inventors: Mosimann, Walter; Back, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-16126/+, Process for dyeing natural or synthetic polyamide fibre materials with 1:1 metal complex dyes, Abstract of the Disclosure The present invention relates to a process for dyeing natural or synthetic polyamide fibre material from an aqueous liquor with dyes in the presence of an alkali metal salt or an ammonium salt and in the presence of an assistant, which process comprises dyeing said fibre material with at least one sulfonated 1:1 metal complex dye or with a mixture containing at least one sulfonated 1:1 metal complex dye and at least one sulfonated metal-free dye in the presence of, 10 to 45 percent by weight of an alkali metal fluorosilicate or ammonium fluorosilicate or 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 June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 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.