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Expired Canadian patentCanada

Recovery of aluminum from aluminum-glass cloth residues

CA 1098496 A · Owner: Skelton, John P. · Inventors: Skelton, John P.

CIPO record

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

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Abstract From the Canadian patent

Abstract of the Disclosure, A method is described for reclaiming aluminum from aluminum-glass cloth residues in which the glass cloth fibers are coated with aluminum, the glass cloths having been used for the filtering of molten aluminum. The method comprises the steps of: breaking down the residue into small pieces by the action of a rotating multi-blade cutter in cooperation with at least one fixed blade and a contoured screen whereby the residue is continuously chopped until pieces thereof are fine enough to pass through the screen. This chopping action effectively frees the glass fibers from the aluminum and the resulting freed glass fiber is then separated from the remaining aluminum …

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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 29, 1977
GrantedMarch 31, 1981
Term endedMarch 31, 1998
Patent numberCA 1098496 A
Classification (IPC)C22C1/00 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedJune 29, 1977Patent grantedMarch 31, 1981Term endedMarch 31, 1998

Sources & verification

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