Expired Canadian patentCanada
Cleaning and etching process for aluminum containers
CA 1189773 A · Owner: Atochem North America, Inc. · Inventors: Carroll, James W.; Comstock, James E.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Drawn and ironed (D & I) aluminum can bodies are prepared for conversion coating by cleaning and etching using a spray of a dilute aqueous solution of caustic and chelating agent at temperatures of up to about 130°F.
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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 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 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.
FiledAugust 19, 1983
GrantedJuly 2, 1985
Term endedJuly 2, 2002
Patent numberCA 1189773 A
Classification (IPC)C23F1/36 +1 more
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.