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Expired Canadian patentCanada

Metallized film capacitors

CA 1109935 A · Owner: Illinois Tool Works Inc. · Inventors: Rayburn, Charles C.

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 The present invention provides a product which has all of the many advantages of pleated, wound electrical, capacitors and also has the added advantage that it may be manufactured with commercially available metallized dielectric materials. A further advantage of the present invention is that the same basic starting materials may be used to manufacture capacitors that have a number of different pleating combinations. Thus, the invention provides for an electrical capacitor segment which comprises a dielectric layer having a center line, a first metallized electrode layer applied to one side of the dielectric layer so that an unmetallized margin extends along each …

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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 September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 12, 1980
GrantedSeptember 29, 1981
Term endedSeptember 29, 1998
Patent numberCA 1109935 A
Classification (IPC)H01G4/26

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Application filedSep 12, 1980Patent grantedSep 29, 1981Term endedSep 29, 1998

Sources & verification

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