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Expired Canadian patentCanada

Capacitor with integral discharge resistor and method of manufacture

CA 1181494 A · Owner: Universal Manufacturing Corp. · Inventors: Patterson, Leroy R.; Pentecost, Harry L.; Delvy, Robert J.

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Abstract From the Canadian patent

Abstract of the Disclosure In a capacitor of the wound metallized dielectric type, a section of resistive material is provided on a film forming the metallized dielectric, and this resistive material extends across the film's entire width (the axial dimension of the capacitor). A metal contact for one of the capacitor plates is sprayed on either end of the capacitor so as to touch one end of the section of resistive material, thereby creating a resistive shunt across the plates formed on the metallized film. The section of resistive material is preferably carbon-loaded paper which is secured over an unmetallized area to the film used to make the capacitor. The paper projects beyond either …

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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 January 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 3, 1983
GrantedJanuary 22, 1985
Term endedJanuary 22, 2002
Patent numberCA 1181494 A
Classification (IPC)H01G4/40

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedNov 3, 1983Patent grantedJan 22, 1985Term endedJan 22, 2002

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