Process for producing aluminum hydroxide
CA 1288576 C · Owner: Goheen, Richard H. · Inventors: The, Paul J.; Goheen, Richard H.; Nigro, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing aluminum hydroxide including the steps of:, (a) dissolving colorant-containing aluminum hydroxide for forming a solution;, (b) treating the solution for collecting colorant into solid phase material;, (c) separating the solid phase material from the solution; and, (d) precipitating aluminum hydroxide of improved whiteness from the solution.
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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 September 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 2008.
- 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.