The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2016
Filed:
Feb. 27, 2013
Tso3 Inc., Quebec, CA;
Bruno Tremblay, Quebec, CA;
Jean-Martin Vallieres, Quebec, CA;
TSO3 INC., Quebec, CA;
Abstract
A method of metering of hydrogen peroxide gas into an evacuated sterilization chamber is disclosed. The method includes the steps of continuously monitoring a pressure in the sterilization chamber; connecting a passage of known volume to the evacuated chamber for evacuating the passage; sealing the passage; connecting the evacuated passage to a supply of hydrogen peroxide solution for a time sufficient to draw the hydrogen peroxide solution into and fill the passage; sealing the passage; and repeating those steps until a preselected pressure increase in the sterilization chamber is detected. The pressure increase is preferably 19 Torr. The known volume of the metering passage is preferably between 75 μL and 15 μL to control unwanted condensation of hydrogen peroxide in the sterilization chamber. Expensive peroxide concentration measurement systems are replaced with an economical low cost pressure sensor for control of the hydrogen peroxide concentration.