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Expired Canadian patentCanada

Process and apparatus for introducing metal chips into a molten bath thereof

CA 1301463 C · Owner: Dudley, Robert H. · Inventors: Dudley, Robert H.; Areaux, Larry D.

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

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Abstract From the Canadian patent

A process for the introduction of metal chips especially scrap metal chips, into a molten mass of the metal of which said chips are formed, wherein the essentially dry chips are first compacted and placed into strip form, and then introduced into the molten metal bath in such strip form in an essentially continuous manner is, disclosed. A cleaning flux is also advantageously incorporated with the chips, into the compacted and strip form thereof, and thence into the bath. The metal chips after, compacting and placing into strip form are introduced, directly into the molten metal bath through the skin of metal oxide existing on its surface and caused to become a part of the metal pool beneath …

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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.
FiledMarch 9, 1987
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301463 C
Classification (IPC)C22B9/16 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMarch 9, 1987Patent grantedMay 26, 1992Term endedMay 26, 2009

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