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Expired Canadian patentCanada

Refractory lining for a pig iron container

CA 1062733 A · Owner: Veitscher Magnesitwerke-Actien-Gesellschaft · Inventors: Gulas, Hans-Jurgen

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A refractory lining for a vessel holding pig iron comprises magnesite-chromite bricks containing from 15-30% by weight, of chromic oxide. The chromite is so highly dissolved in the brick mass that it has no more than a 12% by volume, residue of chromite.

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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 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 18, 1996.
  • 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—
GrantedSeptember 18, 1979
Term endedSeptember 18, 1996
Patent numberCA 1062733 A
Classification (IPC)C04B35/04 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedSep 18, 1979Term endedSep 18, 1996

Sources & verification

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