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Expired Canadian patentCanada

Remote light indication fault indicator with a timed reset circuit and a manual reset circuit

CA 2276762 C · Owner: Schweitzer, Edmund O. Jr. · Inventors: Schweitzer, Edmund O. Jr.; Feight, Laurence V.

CIPO record

Overview

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

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Abstract From the Canadian patent

A fault indicator contained within a protective equipment closure of the type used to house pad-mounted components of a power distribution system detects the occurrence of a fault current in a monitored conductor and provides a light indication thereof. The fault indicator includes a circuit monitoring module having an integral fault indicator flag module and a remote fault indicator light module. A status-indicating flag is rotatably mounted in the integral fault indicator flag module. The flag is positioned in either a reset indicating position or a fault indicating position by a magnetic pole piece which is magnetized in one magnetic direction or the other by momentary application of a …

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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

  • Filed June 29, 1999 and granted June 11, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2021.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 29, 1999
GrantedJune 11, 2002
Term endedJune 29, 2019
Patent numberCA 2276762 C
Classification (IPC)G01R19/16 +2 more

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedJune 29, 1999Patent grantedJune 11, 2002Term endedJune 29, 2019

Sources & verification

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