Karen M Thomas

6558529, May 6, 2003

Feb 7, 2000

09/499421

Iain F. McVey - Lakewood OH
Brian J. DeSantis - Chicago IL
Jan J. Lewandowski - South Euclid OH
Karen L. Thomas - Eastlake OH
Brian E. Schindly - Mentor OH

Steris Inc. - Temecula CA

G01N 2726

205787, 134 2, 134 42, 134113, 134201, 204400, 204402, 204412, 205775

An electrochemical sensor (A, Aâ) is specific for the detection of peroxyacetic acid in a solution which also contains hydrogen peroxide. A potential is applied between a reference electrode ( â) and a working electrode ( â). A read voltage (FIG. ) is selectively pulsed across a counter electrode ( â) and the working electrode. The current flowing between the working electrode and the counter electrode is dependent on the peroxyacetic acid concentration in the solution (FIG. ). By careful selection of the read voltage, the contribution of hydrogen peroxide to the current flow is virtually negligible. The sensor effectively measures peroxyacetic acid concentrations in the range generally employed in sterilization and disinfection baths (100-3000 ppm. ).

20030209450, Nov 13, 2003

Apr 1, 2003

10/404609

Iain McVey - Lakewood OH, US
Brian DeSantis - Chicago IL, US
Jan Lewandowski - South Euclid OH, US
Karen Thomas - Eastlake OH, US
Brian Schindly - Mentor OH, US

G01N027/26

205/782000, 204/416000, 204/412000, 205/789000

An electrochemical sensor (A, A′) is specific for the detection of peroxyacetic acid in a solution which also contains hydrogen peroxide. A potential is applied between a reference electrode () and a working electrode (). A read voltage (FIG. ) is selectively pulsed across a counter electrode () and the working electrode. The current flowing between the working electrode and the counter electrode is dependent on the peroxyacetic acid concentration in the solution (FIG. ). By careful selection of the read voltage, the contribution of hydrogen peroxide to the current flow is virtually negligible. The sensor effectively measures peroxyacetic acid concentrations in the range generally employed in sterilization and disinfection baths (100-3000 ppm.).

59978147, Dec 7, 1999

Dec 31, 1997

9/002096

David E. Minerovic - Concord OH
Christopher M. Fricker - Mentor OH
Todd A. Christopher - New Palestine IN
Brian E. Schindly - Mentor OH
Karen Thomas - Eastlake OH

Steris Corporation - Mentor OH

A61L 900

422 29

An outer, first cup portion having a peripheral wall which has an opening at a first end and at a second end. An inner, second cup portion having a region which is formed from a first material which is impermeable to the powdered reagents but is permeable to water and to solutions containing dissolved reagents, the first and second cup portions being configured such that the second cup portion peripheral wall abuts and is connected to the first end of the outer first cup portion, the first and second being configured such that a first powdered reagent receiving chamber is defined in the first cup portion for receiving a first reagent and a second powdered reagent receiving chamber is defined in the second cup portion for receiving a second reagent, a closure secured to and closing the second end of the outer first cup portion, the closure being impermeable to the first reagent.

63259680, Dec 4, 2001

Dec 23, 1998

9/221019

Christopher M. Fricker - Mentor OH
Todd A. Christopher - New Palestine IN
Brian E. Schindly - Mentor OH
Karen Thomas - Eastlake OH
David E. Minerovic - Concord OH
Michael F. Jusek - Cleveland OH

Steris Corporation - Mentor OH

A61L 200

422 28

An outer, first container portion (50) has a peripheral wall (52) which has an opening at a first end (56) and at a second end (60). A porous filter (58) covers the second end. An inner, second container portion (70) has a peripheral wall (72) with a region which is formed from a first material which is impermeable to the powdered reagents but is permeable to water and to solutions containing dissolved reagents. The first and second container portions are configured such that the second container portion peripheral wall abuts and is connected to the first end of the outer first container portion. The first and second container portions define a first powdered reagent receiving chamber in the first container portion for receiving a first reagent and a second powdered reagent receiving chamber in the second container portion for receiving a second reagent. The porous filter is impermeable to the first reagent but permeable to water and to solutions containing dissolved reagents.