Ruthann R Duda

US Patent:

20130302849, Nov 14, 2013

Filed:

Oct 28, 2011

Appl. No.:

13/881154

Inventors:

Jeffrey D. Smith - Marine on St. Croix MN, US
Jeffrey C. Pederson - Minneapolis MN, US
Sailaja Chandrapati - Woodbury MN, US
RuthAnn R. Duda - Eagan MN, US

International Classification:

C12Q 1/22

US Classification:

435 31, 4352874

Abstract:

A biological sterilization indicator (BI) and method of using same. The BI can include a housing, and a container positioned in the housing. The container can contain a liquid and at least a portion of the container can be frangible. The BI can further include a first chamber and a second chamber. The second chamber can include at least one source of biological activity. The BI can further include a first fluid path positioned to fluidly couple the first chamber and the second chamber, and a second fluid path positioned to allow displaced gas to move out of the second chamber. The method can include moving displaced gas out of the second chamber via the second fluid path as a sterilant is moved into the second chamber via the first fluid path and/or as the liquid is moved into the second chamber via the first fluid path.

US Patent:

20130224849, Aug 29, 2013

Filed:

Oct 28, 2011

Appl. No.:

13/881741

Inventors:

Sailaja Chandrapati - Woodbury MN, US
Heather M. Webb - Woodbury MN, US
Jeffrey C. Pederson - Minneapolis MN, US
Jeffrey D. Smith - Marine on St. Croix MN, US
RuthAnn R. Duda - Eagan MN, US
Brian J. Engel - Houston TX, US

Assignee:

3M INNOVATIVE PROPERTIES COMPANY - ST. PAUL MN

International Classification:

C12Q 1/22

US Classification:

4352874

Abstract:

A biological sterilization indicator (BI). The BI can include a housing, and a container positioned in the housing. The container can contain a liquid and at least a portion of the container can be frangible. The BI can further include a first chamber and a second chamber. The second chamber can include at least one source of biological activity. The BI can further include a substrate positioned in the housing between the first chamber and the second chamber. The substrate can be positioned in fluid communication with the first chamber and the second chamber, and the substrate can be further positioned such that the substrate is not in direct contact with the source of biological activity.

US Patent:

20190255208, Aug 22, 2019

Filed:

Oct 12, 2017

Appl. No.:

16/341209

Inventors:

- SAINT PAUL MN, US
TIMOTHY J. NIES - STILLEATER MN, US
BARRY W. ROBOLE - WOODVILLE MN, US
ASSUMPTA A. G. BENNAARS-EIDEN - WOODBURY MN, US
JODI L. CONNELL - SAINT PAUL MN, US
TONYA D. BONILLA - WOODBURY MN, US
TOMOTHY A. KOHMAN - COTTAGE GROVE MN, US
RUTHANN R. DUDA - EAGAN MN, US

Assignee:

3M INNOVATIVE PROPERTIES COMPANY - SAINT PAUL MN

International Classification:

A61L 2/28
C12Q 1/22

Abstract:

A microbial indicator device for liquid disinfection comprises a first cavity, a source of biological activity fluidically coupled to the first cavity via a portion of a first fluidic path, a filter membrane positioned in a second fluidic path for a disinfectant, and a first coupling portion fluidically coupled to the source of biologically activity via the second fluidic path. The filter membrane has a first side and a second side, wherein the first side is in fluid communication with the first fluidic path. The filter membrane has a pore size sufficient to retain at least a portion of the source of biological activity on the first side. The device further comprises a frangible container contained in the first cavity, wherein a liquid in the container is in fluid communication with the first cavity when the container is fractured.

US Patent:

20170175163, Jun 22, 2017

Filed:

Mar 24, 2015

Appl. No.:

15/129442

Inventors:

- ST. PAUL MN, US
RuthAnn R. DUDA - EAGAN MN, US
G. MARCO BOMMARITO - STILLWATER MN, US
TIMOTHY J. NIES - STILLWATER MN, US
KAI QIU - SHANGAHI, CN

International Classification:

C12Q 1/22
A61L 2/28
A61B 90/70
A61L 2/18

Abstract:

A composition for monitoring the efficacy of a decontamination process is provided, the composition comprising a cellulose polymer and a predetermined quantity of an adenine nucleotide. A monitoring device comprising a test element with the composition disposed thereon is also provided. The composition and/or monitoring device can be used in a method. The method includes exposing the monitoring device to a decontamination process and subsequently measuring the residual tracer analyte on the monitoring device.

US Patent:

20160186120, Jun 30, 2016

Filed:

Mar 9, 2016

Appl. No.:

15/064918

Inventors:

- St. Paul MN, US
Heather M. Webb - Woodbury MN, US
Jeffrey C. Pederson - Minneapolis MN, US
Jeffrey D. Smith - Marine on St. Croix MN, US
RuthAnn R. Duda - Eagan MN, US
Brian J. Engel - Houston TX, US

International Classification:

C12M 1/12
C12M 1/00

Abstract:

A biological sterilization indicator (BI). The BI can include a housing, and a container positioned in the housing. The container can contain a liquid and at least a portion of the container can be frangible. The BI can further include a first chamber and a second chamber. The second chamber can include at least one source of biological activity. The BI can further include a substrate positioned in the housing between the first chamber and the second chamber. The substrate can be positioned in fluid communication with the first chamber and the second chamber, and the substrate can be further positioned such that the substrate is not in direct contact with the source of biological activity.

US Patent:

20150004682, Jan 1, 2015

Filed:

Sep 17, 2014

Appl. No.:

14/488332

Inventors:

- St. Paul MN, US
Jeffrey C. Pederson - Minneapolis MN, US
Sailaja Chandrapati - Woodbury MN, US
RuthAnn R. Duda - Eagan MN, US

International Classification:

C12Q 1/22

US Classification:

4352874

Abstract:

A biological sterilization indicator (BI) and method of using same. The BI can include a housing, and a container positioned in the housing. The container can contain a liquid and at least a portion of the container can be frangible. The BI can further include a first chamber and a second chamber. The second chamber can include at least one source of biological activity. The BI can further include a first fluid path positioned to fluidly couple the first chamber and the second chamber, and a second fluid path positioned to allow displaced gas to move out of the second chamber. The method can include moving displaced gas out of the second chamber via the second fluid path as a sterilant is moved into the second chamber via the first fluid path and/or as the liquid is moved into the second chamber via the first fluid path.