Method of producing corrugated metal sheeting and method of producing honeycomb structure therefrom for carrying catalystic agents used for purifying exhaust gases
CA 2043760 A1 · Owner: Nippon Steel Corporation · Inventors: Minamida, Katsuhiro; Sugihashi, Atsushi; Kido, Motoi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method produces a corrugated metal sheeting including a flat metal sheet and a corrugated metal sheet joined to each other, which sheeting is used to produce a carrier or honeycomb structure for carrying catalystic agents used for purifying exhaust gases from for example, an internal combustion engine of an automobile. In the method, the flat and corrugated metal sheets are brought together so that corrugations of the corrugated metal sheet are successively brought into contact with the flat metal sheet in such a manner that the corrugated metal sheet is freely movable to thereby release resilient stresses therefrom and a, laser beam is incident on a contact line between the flat metal …
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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 June 3, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 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.