A method and an apparatus for activating a metal surface
CA 2004397 A1 · Owner: Thomassen & Drijver-Verblifa N.V. · Inventors: Ter Horst, Gerrit Harmen Freerk; Van Dongen, Cornelis Jacobus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
X Sch/gn /102 TDV, Abstract, The invention has for its object to offer a method using which a metal surface displays improved properties. These improved properties are in particular an improved flow of lacquer of the like over the surface the adhesion of, this lacquer to that surface and a general improvement in the lacquering and printing qualities of a metal surface. The invention provides a method for activating a metal surface, for example for improving the flow of lacquer over and/or the adhesion of lacquer to a tin surface comprising, the steps of:, 1) providing a lightly greased or oiled metal surface for example the surface of a tin plate of strip; 2) subjecting that metal surface …
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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 December 1, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 1, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 2011.
- 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.