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Expired Canadian patentCanada

Method for sterilizing objects to be sterilized and sterilizing apparatus

CA 1314685 C · Owner: Masuda, Senichi · Inventors: Masuda, Senichi

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 method for sterilizing objects to be sterilized is disclosed, in which an object to be sterilized such as a hand piece is preliminarily brought into a wetted state, and then accommodated and airtightly closed up within a sterilizing chamber communicated with an oxygen cylinder, oxygen fed from the oxygen cylinder is introduced into an ozonizer to produce ozonized oxygen gas having an ozone concentration of at least 10000 ppm, preferably 15000 ppm or higher, then the ozonized oxygen gas is made to pass through the sterilizing chamber after it has been heated up to perfectly replace air within the sterilizing chamber by the ozonized oxygen gas also, moisture adhered to the objects to be …

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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 March 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 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.
FiledFebruary 24, 1988
GrantedMarch 23, 1993
Term endedMarch 23, 2010
Patent numberCA 1314685 C
Classification (IPC)A61L2/20 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedFeb 24, 1988Patent grantedMarch 23, 1993Term endedMarch 23, 2010

Sources & verification

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