Dyestuff composition for the dyeing or printing of cellulose fiber materials
CA 1069258 A · Owner: Hoechst Aktiengesellschaft · Inventors: Noll, Walter; Spange, Arno; Meininger, Fritz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dyestuff composition for the dyeing or printing of natural or regenerated cellulose fiber materials consisting, of 20 to 70 percent by weight of C.I. Reactive Blue 19 (sodium salt), anthraquinone-2-sufonic acid (sodium salt) a, condensation product of naphthalene-sulfonic acid with formaldehyde (sodium salt), a condensed phophate (sodium salt) and a dust-preventing agent.
Read the whole patent
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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.