Anodically anodizing aluminium in organic polybasic acid for printing plate support
CA 1190510 A · Owner: American Hoechst Corporation · Inventors: Rozell, William J.; Gillich, Thomas N.; Walls, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for anodically oxidizing materials in the form of sheets, foils or strips, comprising aluminum or aluminum alloys in an, aqueous-electrolyte which contains at least 0.05% by weight of at least one polybasic organic acid, if appropriate after a foregoing mechanical chemical, and/or electrochemical roughening in which the polybasic organic acid is polymeric and is selected from the group consisting of phosphonic acid sulfonic, acid and carboxylic acid. The resulting anodized and sealed metal sheets have improved corrosion resistance and are especially suitable for lithography. Lithographic sheets made by this invention exhibit improved adhesion for light sensitive …
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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 July 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 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.