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Expired Canadian patentCanada

Flexible tape having bridges of electrically conductive particles extending across the pressure sensitive adhesive layer

CA 1237176 A · Owner: Minnesota Mining And Manufacturing Company · Inventors: Hartman, Richard B.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Flexible tape having a pressure-sensitive adhesive layer containing particles, each particle having a ferromagnetic core and an electrically conductive surface. By virtue of the ferromagnetic cores the particles can be, magnetically attracted to form a large number of discrete electrically conductive bridges extending through the thickness of the adhesive layer. The tape can be used both to bond together and to electrically connect individual members of facing arrays of electrodes.

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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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 17, 1985
GrantedMay 24, 1988
Term endedMay 24, 2005
Patent numberCA 1237176 A
Classification (IPC)H01B1/22 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJuly 17, 1985Patent grantedMay 24, 1988Term endedMay 24, 2005

Sources & verification

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