Surface treated steel sheet reduced in plating defects and production thereof
CA 2110281 C · Owner: Kato, Chiaki · Inventors: Tobiyama, Yoichi; Morito, Nobuyuki; Kato, Chiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of inhibiting failures in plating at a low cost in a stabilized manner in the step of subjecting a steel sheet containing a highly oxidizable element such as Si Mn, P, Ti, Nb, Al, Ni, Cu, Mo, V, Cr or B to hot-dip galvanizing and hot-dip alloy galvanizing in a continuous line after annealing or to electroplating after annealing; and a surface-treated steel sheet reduced in plating defects. A surface-treated steel sheet which is reduced in plating defects has an iron plating, layer just under a zinc plating layer or a zinc alloy plating layer and has a layer enriched with steel ingredients just under the iron plating layer, is produced by applying iron plating to at least one side …
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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 March 30, 1993 and granted May 15, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2015.
- 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.