Process for continuous dip coating of a steel strip
CA 2040376 C · Owner: Centre De Recherches Metallurgiques- Centrum Voor Research In De Metallurgie · Inventors: Leroy, Vincent; Lamberigts, Marcel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The steel strip is passed through a zinc bath with an aluminium content of approximately 55% by weight and a silicon content of 1% to 2% by weight, to which is added strontium in a quantity equal to 0.2% maximum by weight and at least one other element selected from among vanadium and chromium, each in a quantity equal to 0.2% maximum by weight. The addition of strontium and chromium and/or vanadium stabilises the structure of the coating and reduces the formation of acicular precipitates of silicon. The coating has an improved adherence and ductility which permits it to be formed without cracking, while retaining an excellent resistance to corrosion. The resulting crystallisation pattern …
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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 April 12, 1991 and granted June 20, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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
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.