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Expired Canadian patentCanada

Glass melting furnace of improved efficiency

CA 1323192 C · Owner: Pieper, Helmut · Inventors: Pieper, Helmut

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

Helmut PIEPER, ABSTRACT, A novel gas melting furnace provides for the feed mixture to be placed into and onto a melting tank of molten glass along the narrow margin of the furnace and hence to flow across the full width thereof and the furnace comprises burners postitioned adjacent the narrow margins for supplying additional energy as well as heat exchangers for heat exchanging between combustion or exhaust gases and the combustion air supplied to the burner.

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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 October 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 19, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 22, 1987
GrantedOctober 19, 1993
Term endedOctober 19, 2010
Patent numberCA 1323192 C
Classification (IPC)C03B5/04 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJan 22, 1987Patent grantedOct 19, 1993Term endedOct 19, 2010

Sources & verification

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