Silver-or silver-copper alloy-metal oxide composite material and process of producing the same
CA 2045811 A1 · Owner: Sumitomo Metal Industries, Ltd. · Inventors: Shibata, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A silver-metal oxide composite material comprising a silver matrix or silver-copper alloy matrix containing 50% by weight or less of copper, (a) from 0.5 to 25% by weight in terms of elemental metal, of an oxide of at least one element selected from the group consisting of Mg Al, Zr, Ca, Ce, Be, Th, Sr, Ti, Cr, Hf and Si and, optionally, (b) from 0.01 to 5% by weight in terms of elemental met-, al, of an oxide of at least one element selected from the group consisting of Bi, Pb, Cd, Zn, Sn Sb, Mn and iron, family metals; the oxide of the (a) element and where, present, the oxide of the (b) element being dispersed in the form of fine particles with a particle size of not more than about 0.1 …
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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 27, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 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.