Lead-provided porous metal sheet and method for manufacturing the sheet
CA 2136804 A1 · Owner: Katayama Special Industries, Ltd. · Inventors: Sugikawa, Hirofumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of manufacturing a lead-provided porous metal sheet comprises the steps of: forming a porous metal material having a metal layer on a surface of a framework of a porous base material comprising a foamed sheet and the like, by plating the porous base material and/or applying fine metal powders thereto; passing the porous metal material through a pair of rolls having a plurality of projections to compress the porous metal material against the projections and reduce or eliminate pores so as to form one or more recesses extending; and forming solid metal portions by applying fine metal powders to the entire recesses.
Read the whole patent
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 November 28, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 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.