Pickling process in an acid bath of metallic products containing titanium or at least one chemical element of the titanium family
CA 2037893 C · Owner: Usinor Sacilor (Societe Anonyme) · Inventors: Henriet, Dominique; Prost, Laurent; Paul, Didier
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pickling process in an acid bath containing an oxidant in order to enhance the pickling kinetics wherein at least one, peroxygenated derivative of titanium or at least of one element of the titanium family included in the product to be pickled is formed the metal being ionized to a higher valency the formation of the, peroxygenated compound is controlled by measurement of the redox potential, and the quantity of oxidizing agent is limited so as to maintain an oxido-reduction potential lower than the passivation potential of the metallic product
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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 25, 1990 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2012.
- 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.