Patent Yard Sign in
Expired Canadian patentCanada

Dielectric fluid for a capacitor

CA 1193085 A · Owner: Emhart Industries, Inc. · Inventors: Shedigian, Vandos

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

In a capacitor a dielectric provides zero to about 10 weight percent of an antioxidant and glyceryl triacetate. The capacitor body includes metallized polypropylene film forming the electrodes and a separating dielectric. Air is excluded from the capacitor body during construction and dielectric fluid is prevented from impregnating the body and from imbibing into the polypropylene film by the characteristics of the glyceryl triacetate. By means of this construction disruptive electrical or corona discharges and their harmful effects are reduced.

Read the whole patent

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 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 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.
FiledDecember 7, 1983
GrantedSeptember 10, 1985
Term endedSeptember 10, 2002
Patent numberCA 1193085 A
Classification (IPC)H01G4/22

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedDec 7, 1983Patent grantedSep 10, 1985Term endedSep 10, 2002

Sources & verification

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