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Expired Canadian patentCanada

Porous metal bodies

CA 1307952 C · Owner: Corning Incorporated · Inventors: Pierotti, Kim Doreen; Wusirika, Raja Rao

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

This invention is concerned with the production of hard, porous, sintered bodies consisting essentially of Al and Fe with, optionally, Sn and/or Cu and/or Cr. The mechanism of the invention relies upon the presence of a small amount of Mg and/or Ca to act as a getter for oxygen. In the preferred embodiment particles of, the metals can be extruded into honeycomb structures which can then be fired in the presence of Mg and/or Ca to yield sound high cell density structures of controlled porosity.

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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 September 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 26, 1988
GrantedSeptember 29, 1992
Term endedSeptember 29, 2009
Patent numberCA 1307952 C
Classification (IPC)B22F5/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedApril 26, 1988Patent grantedSep 29, 1992Term endedSep 29, 2009

Sources & verification

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