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Expired Canadian patentCanada

Method and apparatus for making molten glass

CA 1065610 A · Owner: Ppg Industries, Inc. · Inventors: Schwenninger, Ronald L.

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, In a continuous fuel-fired, glass melting furnace, a pair of substantially horizontal longitudinally extending, electrodes are provided in the molten glass closely adjacent to the sides of the floating batch blanket for supplying electrically generated booster heat to the underside of the batch blanket. The electrodes extend a substantial distance into the melting zone of the furnace through the fill end wall. The electrodes also serve as physical barriers that prevent the batch blanket from drifting into contact with sidewalls of the furnace. The electrode arrangement boosts melting rates with efficient utilization of electrical energy and avoids, furnace wall …

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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 November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 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—
GrantedNovember 6, 1979
Term endedNovember 6, 1996
Patent numberCA 1065610 A
Classification (IPC)C03B5/16

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedNov 6, 1979Term endedNov 6, 1996

Sources & verification

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