Installation for removing the zinc deposited by electrolysis on aluminium plates
CA 2047441 C · Owner: Valdes, Jose Maria Martinez · Inventors: Valdes, Jose Maria Martinez; Fernandez, Vicente Arregui; Menendez, Fernando Maria Sitges
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Installation for removing zinc deposited by electrolysis aluminium plates. The installation includes a storage zone for zinc cathode (1), a zinc scraping zone (2) and a storage zone (3) for zinc free cathodes the cathodes, being displaced consecutively from one zone to another. The scraping zone (2) has a horizontally acting lateral piercer (22) that separates the upper edge of the sheets of deposited zinc from the cathodes, and a vertically acting scraping device (23) for removing all the zinc sheets. On one of their vertical sides the cathodes have, an upper zone of lesser thickness to which is fixed coatings (76) of dielectric material, whose surface is coplanar with that of the cathode …
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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
- Filed July 19, 1991 and granted February 3, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2013.
- 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
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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.