Thao V Pham

US Patent:

6425993, Jul 30, 2002

Filed:

Mar 23, 2000

Appl. No.:

09/534149

Inventors:

Mark K. Debe - Stillwater MN
Thao Ngoc Pham - Minneapolis MN
Andrew J. Steinbach - St. Paul MN

Assignee:

3M Innovative Properties Company - Saint Paul MN

International Classification:

C25B 1300

US Classification:

204296, 204283, 429 33, 428421, 4284735, 4284744, 428522

Abstract:

A method is provided for making a membrane electrode that employs a composite membrane, which include both a porous membrane and an ion conducting electrolyte, by partially filling a porous membrane with an ion conducting electrolyte to form a partially filled membrane and then compressing the partially filled membrane with electrode particles so as to remove void volume from the partially filled membrane and embed the electrode particles in the partially filled membrane. The membrane electrode of this invention is suitable for use in electrochemical devices, including proton exchange membrane fuel cells, electrolyzers, chlor-alkali separation membranes, and the like.

US Patent:

7211204, May 1, 2007

Filed:

Dec 12, 2003

Appl. No.:

10/735424

Inventors:

Roger Francis Bernards - South Haven MN, US
Beth Ann LaFayette - Minneapolis MN, US
Thao Pham - Plymouth MN, US

Assignee:

Electrochemicals, Inc. - Maple Plain MN

International Classification:

H01B 1/24

US Classification:

252511

Abstract:

A corrosive composition, such as an alkaline aqueous carbon dispersion, a cleaner, a cleaner conditioner, or a conditioner, comprises a corrosion inhibitor, e. g. , benzotriazole. The corrosion inhibitor is present in an amount effective to reduce or stop the dissolution of metal from a metallic surface, such as a printed circuit board, in contact with the composition. A method to reduce or stop the dissolution of metal from a metallic surface in contact with a corrosive composition, and a method to stabilize or recover a corrosive composition containing metal contaminants by adding an effective amount of a corrosion inhibitor to the corrosive composition.

US Patent:

20060102879, May 18, 2006

Filed:

Dec 29, 2005

Appl. No.:

11/321409

Inventors:

Roger Bernards - South Haven MN, US
Beth LaFayette - Minneapolis MN, US
Thao Pham - Plymouth MN, US

International Classification:

H01B 1/12

US Classification:

252500000

Abstract:

A corrosive composition, such as an alkaline aqueous carbon dispersion, a cleaner, a cleaner conditioner, or a conditioner, comprises a corrosion inhibitor, e.g., benzotriazole. The corrosion inhibitor is present in an amount effective to reduce or stop the dissolution of metal from a metallic surface, such as a printed circuit board, in contact with the composition. A method to reduce or stop the dissolution of metal from a metallic surface in contact with a corrosive composition, and a method to stabilize or recover a corrosive composition containing metal contaminants by adding an effective amount of a corrosion inhibitor to the corrosive composition.

US Patent:

60429593, Mar 28, 2000

Filed:

Oct 10, 1997

Appl. No.:

8/948851

Inventors:

Mark K. Debe - Stillwater MN
Thao Ngoc Pham - Minneapolis MN
Andrew J. Steinbach - St. Paul MN

Assignee:

3M Innovative Properties Company - Saint Paul MN

International Classification:

H01M 810
H01M 486

US Classification:

429 33

Abstract:

A method is provided for making a membrane electrode that employs a composite membrane, which include both a porous membrane and an ion conducting electrolyte, by partially filling a porous membrane with an ion conducting electrolyte to form a partially filled membrane and then compressing the partially filled membrane with electrode particles so as to remove void volume from the partially filled membrane and embed the electrode particles in the partially filled membrane. The membrane electrode of this invention is suitable for use in electrochemical devices, including proton exchange membrane fuel cells, electrolyzers, chlor-alkali separation membranes, and the like.