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Expired Canadian patentCanada

Slide gate for containers holding liquid metal melt

CA 1101185 A · Owner: Martin & Pagenstecher G.M.B.H. · Inventors: Vahlhaus, Dieter; Aller, Walter; Eisermann, Eckehard

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

An improvement in a slide gate for a container holding molten metal comprising a slide housing and refractory bodies made of a refractory Composition, which refractory bodies have been impregnated with carboncontaining media, the improvement residing in employing as the carboncontaining medium an oil containing less than 10% by weight pitch.

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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 19, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 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.
FiledMarch 3, 1978
GrantedMay 19, 1981
Term endedMay 19, 1998
Patent numberCA 1101185 A
Classification (IPC)C04B41/82 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMarch 3, 1978Patent grantedMay 19, 1981Term endedMay 19, 1998

Sources & verification

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