Sealing anodically produced oxide layers on aluminum
CA 1212072 A · Owner: Henkel Kommanditgesellschaft Auf Aktien (Henkel Kgaa) · Inventors: Gohausen, Hans J.; Wennemann, Harald; Kirchhoff, Winfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for sealing anodically produced oxide layers on aluminum and aluminum alloys by treating them with an aqueous solution at a temperature between about 90°C and its boiling point, wherein the aqueous solution has a pH of from about 4 to about 8 and contains from about 0.0005 to about 0.5 g/l of at least one phosphinocarboxylic acid or its water-soluble salt.
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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 30, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 30, 2003.
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Timeline
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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.