Method and apparatus for preparing aqueous solutions of pure sodium hydrosulfite and composition of matter for such solutions
CA 1069672 A · Owner: Cannizzaro, Joseph A. · Inventors: Kise, Mearl A.; Cannizzaro, Joseph A.; Barton, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus and method are disclosed for continuously handling sodium hydrosulfite for use in textile dyeing including means for receiving the pure dry chemical in semi-bulk returnable containers for dissolving, the same in a caustic solution and for storing the resulting solution in low inventory automatic make-up tanks. The novel resulting solution is stabilized against decomposition and may be metered to specified locations in the textile mill.
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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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
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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.