Agent for dissolving insoluble iron(iii) compounds in highly alkaline textile treatment liquors
CA 1191658 A · Owner: Basf Aktiengesellschaft · Inventors: Leppert, Norbert; Lorenz, Klaus; Streit, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An agent, based on reducing agents and complexing agents, for dissolving insoluble iron(III) compounds in aqueous textile treatment baths which are at a pH of 10 or more, which agent has the following composition:, a) from 4 to 65% by weight of one or more watersoluble hydroxycarbonyl compound or of an N- or O-acetal thereof, as the reducing agent, b) from 10 to 80% by weight of one or more complexing agent which complexes Fe++ ions at a pH of 10 or more and, c) water in an amount equal to 100% minus the amounts of a) and b).
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 August 13, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2002.
- 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.