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Expired Canadian patentCanada

System for monitoring sterilant vapor concentration

CA 1319839 C · Owner: Cummings, Arthur L. · Inventors: Cummings, Arthur L.

CIPO record

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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 system is provided for determining the concentration of a condensable vapor in the presence of at least one other condensable vapor, such as hydrogen peroxide and water vapors. The system includes generally a dew point sensor a means for, measuring at least one additional property of at least the other vapor such as relative humidity, and a microprocessor for fitting the dew point and additional property measurements into a modeled construct representative of the relationship between the vapors at a plurality of concentrations for each such vapor and at a plurality of corresponding dew point measurements. When used to determine the concentration of sterilant vapor in a sterilization …

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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 July 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 6, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 21, 1988
GrantedJuly 6, 1993
Term endedJuly 6, 2010
Patent numberCA 1319839 C
Classification (IPC)G01N25/66 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedDec 21, 1988Patent grantedJuly 6, 1993Term endedJuly 6, 2010

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