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Canadian application, no grantCanada

Solid state static power transfer mechanism

CA 2066935 A1 · Owner: Powertrol, Inc. · Inventors: Keefe, John; Keefe, John

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

Abstract of the Disclosure, A solid state static power supply control, mechanism for coordinated transfer of a load from a preferred source of AC power to an alternate source of AC power should the level of power transmitted from the preferred source fall below a set, adjustable level and thereafter, upon re-establishment of the proper level of operating power of the preferred source re-transfer of, the load from the alternate source to the preferred source. A unique method of current interlock prevents the alternate power source from connecting to the load until the current from the preferred source is absolutely interrupted with, the same criteria required for re-transfer from the …

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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 April 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2012.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 23, 1992
GrantedNo grant recorded
Term endedApril 23, 2012
Patent numberCA 2066935 A1
Classification (IPC)H02J9/06

Timeline

Timeline From CIPO dates

1993199519971999200120032005200720092011Application filedApril 23, 1992Term endedApril 23, 2012

Sources & verification

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