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Expired Canadian patentCanada

Remote sensing of gas leaks

CA 2771670 C · Owner: Synodon Inc. · Inventors: Tolton, Boyd T.; Banica, Adrian; Miller, Douglas W.

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 gas filter correlation radiometer mounted on an aircraft is flown over a target area. The gas filter correlation radiometer is configured to detect ethane (C2H6) gas in the event of a gas leak. The gas filter correlation radiometer uses background radiation to detect ethane.

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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 February 16, 2004 and granted April 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 16, 2004
GrantedApril 2, 2013
Term endedFebruary 16, 2024
Patent numberCA 2771670 C
Classification (IPC)G01M3/00 +2 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedFeb 16, 2004Patent grantedApril 2, 2013Term endedFeb 16, 2024

Sources & verification

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