Enhanced protective metallic coating weights for steel sheet
CA 2119938 C · Owner: Sorevco, Inc. · Inventors: Vigeant, Andre F.; Bernard, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A galvanized steel sheet has a coating layer of protective material applied to its surface where the steel sheet has been roughened prior to application of the protective material. The improvement is characterized by the roughened steel surface having a pattern which ensures desired consistent quantity of coating during application of the protective material. The pattern provided on the sheet surface has a multitude of depressions defined by a plurality of ridges. The upper surfaces of the ridges defining a plane for each side of the steel sheet, where the ridges have a surface area less than 1/4, the nominal surface area of the sheet side. Each depression has a depth defined by a …
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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 25, 1994 and granted November 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2016.
- 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.