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Expired Canadian patentCanada

Method of forming ceramic capacitors and circuit boards

CA 1052874 A · Owner: Nl Industries · Inventors: Stynes, James A.

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

Abstract of the Disclosure A monolithic, multilayer, ceramic capacitor is formed by introducing molten metal into a matrix having thin electrode regions between dielectric strata through holes, each, of which extends through a face of said matrix and provides communication between the outside of said matrix and at least one of said regions, around wires or rods inserted in said holes, thereby providing external leads for said capacitor. A similar process is used to provide internal and external connectors for multilayer ceramic, circuit, boards.

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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 April 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 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—
GrantedApril 17, 1979
Term endedApril 17, 1996
Patent numberCA 1052874 A
Classification (IPC)H01G4/12 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedApril 17, 1979Term endedApril 17, 1996

Sources & verification

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