Process for the finishing of fibrous materials
CA 1164159 A · Owner: Hoechst Aktiengesellschaft · Inventors: Springer, Hartmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure:, Fibrous materials of any kind is finished with an organic compound having fiber-finishing properties and containing one or several groups of the formula, - X - ? - CN in which X is sulfonyl or carbonyl and A represents hydrogen or one equivalent of a mono-, bi- or trivalent metal or an ammonium group, is applied onto the fibrous material in the form of an aqueous or organo-aqueous solution or dispersion and the fibrous material thus treated is then subjected if, necessary, to a heat treatment for the fixation of this organic compound onto the fibrous material. Organic fiberfinishing compounds containing the above-mentioned group may be for example dyestuffs, …
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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 March 27, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2001.
- 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.