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Expired Canadian patentCanada

Method for manufacturing thermally stabilized plastic film capacitor

CA 1262478 C · Owner: Rayburn, Charles Calvin · Inventors: Rayburn, Charles Calvin

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Abstract From the Canadian patent

A method for processing a layered structure incorporating alternating plastic film and electrically conductive layers to enhance thermal and capacitive stability of the structure, which plastic film has molecular bonds oriented in a first axis and a second axis the, method comprising the steps of applying compressive force to the structure in a third axis which third, axis is substantially perpendicular to the first and second axes; and raising the structure from an ambient temperature to a processing temperature while maintaining the compressive force on the structure the process-, ing temperature being sufficiently high to randomize the molecular bonds; and maintaining the structure at …

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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 October 24, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 24, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 25, 1986
GrantedOctober 24, 1989
Term endedOctober 24, 2006
Patent numberCA 1262478 C
Classification (IPC)H01G4/30

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedMarch 25, 1986Patent grantedOct 24, 1989Term endedOct 24, 2006

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