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Expired Canadian patentCanada

Corrosion-resistant dental alloy having improved handling characteristics

CA 1069347 A · Owner: Engelhard Minerals And Chemicals Corporation · Inventors: Alcuri, Louis F.(Jr.); Aliotta, Joseph

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Abstract From the Canadian patent

of the Invention, A corrosion-resistant dental alloy is disclosed which has improved handling characteristics during the filling of a dental cavity. The alloy particles are characterized by having a higher than average silver and copper content at the surface by their, unique shape differing from either flake or spherical alloys and, a surface area of about 0.23-0.26 m2/gm. Handling characteristics of an amalgam prepared from such an alloy is similar to those of flake-like particles and differs from amalgams prepared from spherical particles as quantified by newly-described physical tests which have been found to correlate subjective experience. The alloy particles may be combined with …

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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

  • Granted January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJanuary 8, 1980
Term endedJanuary 8, 1997
Patent numberCA 1069347 A
Classification (IPC)C22B5/08 +2 more

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.