Kevork T Adjemian

8569067, Oct 29, 2013

Dec 15, 2011

13/327051

Rameshwar Yadav - Farmington MI, US
Kevork Adjemian - Birmingham MI, US

Nissan North America, Inc. - Franklin TN

G01N 33/00

436 5, 436125

Disclosed herein are methods and devices for evaluating ex-situ chemical degradation of fuel cell membranes. One embodiment of a method for evaluating ex-situ chemical degradation of a membrane comprises submerging a membrane in Fenton solution in a reaction vessel with a non-reactive weight configured to maximize exposure of the membrane to the Fenton solution, sealing the reaction vessel, heating the reaction vessel at a fixed rate to a predetermined temperature, holding the reaction vessel at the predetermined temperature for a predetermined test period, cooling the reaction vessel to room temperature, removing the membrane and analyzing the Fenton solution for fluoride ions.

20040175498, Sep 9, 2004

Feb 6, 2004

10/773822

Lotfi Hedhli - Ardmore PA, US
Kevork Tro Adjemian - King of Prussia PA, US
Thomas Dudley Culp - Drexel Hill PA, US
Gary Stephen Silverman - Chadds Ford PA, US

B05D005/12
C23C016/00
B05D001/36

427/248100, 427/058000, 427/402000

An MEA preparation method involves low temperature plasma deposition of catalysts such as platinum onto a substrate to form a proton-conducting cation-exchange membrane. The substrate may be a solid polymer electrolyte membrane, or may include carbon cloth or carbon particles. The deposition is carried out at atmospheric pressure without the addition of noble gases to the reactant carrier.

20120186664, Jul 26, 2012

Jan 20, 2011

13/010095

Gregory DiLeo - Ann Arbor MI, US
Rameshwar Yadav - Farmington Hills MI, US
Kevork Adjemian - Birmingham MI, US

NISSAN NORTH AMERICA, INC. - Franklin TN

F16K 49/00
G01N 19/10
G01N 1/22

137334, 7386372, 73 2902, 7386311

A water uptake measurement system for measuring uptake of a fluid by a sample includes a sample chamber, a suspension component and a supply interface. A suspension aperture is located at a first end of the sample chamber and extends from an outer surface of the sample chamber to an inner surface of the sample chamber. The suspension component passes through the suspension aperture and is configured to support the sample within the internal cavity such that the sample is spaced apart from the inner surface of the sample chamber. The supply interface is configured to deliver the fluid to the internal cavity of the sample chamber.

20120186994, Jul 26, 2012

Jan 21, 2011

13/011192

Gregory DiLeo - Ann Arbor MI, US
Nilesh Dale - Farmington Hills MI, US
Kevork Adjemian - Birmingham MI, US
Shyam Kocha - Golden CO, US

NISSAN NORTH AMERICA, INC. - Franklin TN

G01N 27/28
F17D 3/00
F16K 37/00

205775, 204412, 137551, 137605

Disclosed herein are fluid distribution methods and assemblies for supplying fluid to test assemblies. One embodiment of a fluid distribution assembly comprises at least two input lines each configured to supply a fluid. A source selection component is connected to the input lines and configured to receive the fluid of the input lines and select from the fluids a target fluid. A range selection component is configured to receive the target fluid and to select a flow range of the target fluid, outputting the target fluid to a flow component comprising a first flow adjustment component having a first flow rate resolution and a second flow adjustment component having a second flow rate resolution. The range selection component is configured to selectively output the target fluid to one of the first flow adjustment component and the second flow adjustment component based on the selected flow range.

20120208106, Aug 16, 2012

Feb 14, 2011

13/026646

Nilesh Dale - Farmington Hills MI, US
Gregory DiLeo - Ann Arbor MI, US
Taehee Han - Farmington Hills MI, US
Kevork Adjemian - Birmingham MI, US

NISSAN NORTH AMERICA, INC. - Franklin TN

H01M 4/02
B05D 5/12
H01M 4/88

429534, 427115

Methods of fabricating gas diffusion electrodes and gas diffusion electrodes made from such methods are disclosed herein. One method of fabricating a gas diffusion electrode for a fuel cell comprises preparing a catalyst ink of a predetermined viscosity. Preparing the catalyst ink comprises mixing a catalyst solution comprising catalyst particles, an ionomer and a solvent at a first speed for a first period of time and homogenizing the catalyst solution at a second speed in a temperature controlled environment for a second period of time, wherein the second period of time is longer than the first period of time, the second period of time and the second speed selected to preserve a structure of the catalyst particles during homogenization. An active electrode layer is formed by spraying the catalyst ink directly on a gas diffusion layer in a single application and a uniform loading.

20130045430, Feb 21, 2013

Aug 16, 2011

13/210739

TAEHEE HAN - FARMINGTON HILLS MI, US
NILESH DALE - FARMINGTON HILLS MI, US
KEVORK ADJEMIAN - BIRMINGHAM MI, US

NISSAN NORTH AMERICA, INC. - Franklin TN

H01M 8/04

429431, 429444

Disclosed herein are processes for recovering performance of fuel cells by recovering fuel cell catalyst activity and methods of testing the durability and activity performance of fuel cells. One catalyst recovery process disclosed herein for a fuel cell having a membrane electrode assembly comprises operating the fuel cell for a first recovery cycle with fuel gas supplied to an anode of the fuel cell and an oxidant supplied to a cathode of the fuel cell while drawing a current from the fuel cell at steady state throughout the first recovery cycle, the first recovery cycle having a predetermined time period. The fuel cell has reached end of life due in part to intermittent use prior to operating the fuel cell for the first recovery cycle. A life of the fuel cell improves when the first recovery cycle is complete.

20130045431, Feb 21, 2013

Aug 16, 2011

13/210827

TAEHEE HAN - FARMINGTON HILLS MI, US
NILESH DALE - FARMINGTON HILLS MI, US
KEVORK ADJEMIAN - BIRMINGHAM MI, US

NISSAN NORTH AMERICA, INC. - Franklin TN

H01M 8/04

429431

Disclosed herein are systems and methods for recovering performance of fuel cells by recovering fuel cell catalyst activity. One system for recovering catalyst performance of a fuel cell stack made of one or more fuel cells in a vehicle comprises a sensor for detecting an EOL state of the fuel cell. A notification device notifies a user when the sensor detects the EOL state of the fuel cell. Means for drawing a steady-state load from the fuel cell stack is used to operate the fuel cell stack until the catalyst performance is recovered.

20130076379, Mar 28, 2013

Sep 22, 2011

13/239838

GREGORY JAMES DILEO - ANN ARBOR MI, US
KEVORK ADJEMIAN - BIRMINGHAM MI, US

NISSAN NORTH AMERICA, INC. - Franklin TN

G01R 27/08
G01B 7/06

324699, 324722

Embodiments of suspension clamps for use in testing membrane samples used in fuel cells are provided. One example of a suspension clamp comprises a frame, a clamp member, a plurality of electrodes, and a suspension component. The clamp member is hingedly attached to one end of the frame. Each of the plurality of electrodes extends along a membrane-facing surface of at least one of the clamp member and the frame. A suspension component is attached to at least one of the clamp member and the frame and is configured to suspend the suspension clamp during testing of a membrane sample. The suspension clamp can be used to measure one or more of resistance, impedance, conductance, proton permeability and through-thickness of the membrane sample.