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Expired Canadian patentCanada

Cable having a corrugated septum

CA 1289209 C · Owner: Lemke, Timothy A. · Inventors: Lemke, Timothy A.

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

A cable structure in round or flat form is characterized by a corrugated septum disposed intermediate an inner and an outer sheath. The septum contacts the sheaths to define tubular envelopes extending axially along the length of the cable. Each of the envelopes is able to receive a predetermined number of conductors. The sheaths and the septum are electrically connectable to a ground potential so as to totally electromagnetically isolate the conductors entirely along their axial lengths.

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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 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 4, 1987
GrantedSeptember 17, 1991
Term endedSeptember 17, 2008
Patent numberCA 1289209 C
Classification (IPC)H02K3/46 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedAug 4, 1987Patent grantedSep 17, 1991Term endedSep 17, 2008

Sources & verification

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