David T Chen

US Patent:

6638416, Oct 28, 2003

Filed:

Sep 24, 2001

Appl. No.:

09/961661

Inventors:

Da Yu Wang - Troy MI
David K. Chen - Rochester Hills MI
Kaius K. Polikarpus - Grand Blanc MI
Walter T. Symons - Grand Blanc MI

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

G01N 27407

US Classification:

205775, 204425, 204426, 204427

Abstract:

A hydrogen sensor and process for measuring hydrogen gas concentrations includes a pump cell and a measuring cell. The pump cell includes a first conducting electrolyte layer having a top and a bottom surface, and an electrode disposed on the top and bottom surfaces, wherein the top electrode is in communication with an unknown concentration of hydrogen gas. The measuring cell includes a second conducting electrolyte layer having a top and a bottom surface, and an electrode disposed on the top and bottom surfaces, wherein the bottom electrode is in communication with a reference gas source. A diffusion-limiting barrier is disposed between the pump cell bottom electrode and the measuring cell top electrode, wherein hydrogen diffusion through the diffusion-limiting barrier is controlled by a Knudsen diffusion mechanism at hydrogen concentrations greater than about 40%.

US Patent:

6979892, Dec 27, 2005

Filed:

Apr 23, 2002

Appl. No.:

10/128536

Inventors:

Bob Xiaobin Li - Grand Blanc MI, US
David Kwo-Shyong Chen - Rochester Hills MI, US
Joachim Kupe - Davisburg MI, US
David Emil Nelson - Independence Township MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

H01L023/20
H05K001/03
H05K005/06
B01J019/08

US Classification:

257682, 257703, 174255, 174256, 361758, 361792, 361795, 422186

Abstract:

A method for preparing a non-thermal plasma reactor substrate includes disposing electrical vias on green stage first and second ceramic plates; filling the electrical vias with conductive material; and forming electrical contact via cover pads; disposing conductive material on the first ceramic plate to form an electrode plate having a main electrode portion and a terminal lead for electrically connecting the main electrode portion to the electrical vias; laminating the electrode plate and the second ceramic plate together, embedding the electrode therebetween; co-firing the plates to form a laminated co-fired embedded-conductor element; stacking a plurality of the laminated co-fired embedded-conductor elements to form a multi-cell stack, the filled electrical vias aligning in the stack to provide an electrical bus for connecting alternating elements in the stack; and disposing spacers with matching vias and via cover pads between adjacent pairs of elements to form exhaust gas passages.

US Patent:

7048844, May 23, 2006

Filed:

Nov 15, 2002

Appl. No.:

10/295338

Inventors:

David K. Chen - Rochester Hills MI, US
Da Yu Wang - Troy MI, US
Yingjie Lin - El Paso TX, US
Raymond L. Bloink - Swartz Creek MI, US
Devesh Srivastava - Flint MI, US
Walter T. Symons - Grand Blanc MI, US
Kaius K. Polikarpus - Grand Blanc MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

G01N 27/407

US Classification:

2057895, 205787, 204426

Abstract:

A sensor comprises: a pump cell comprising an inner pump electrode, an outer pump electrode, a pump cell electrolyte layer interposed between the inner pump electrode and the outer pump electrode and a cell isolation layer disposed on the inner pump electrode on a side opposite the pump cell electrolyte, wherein the outer electrode is in fluid communication with a reducing gas. A reference cell is in operable communication with the pump cell, the reference cell comprising an outer reference electrode and an inner reference electrode, and a reference cell electrolyte interposed between the outer reference electrode and the inner reference electrode. A diffusion limiting material flanks both sides of a chamber formed between the cell isolation layer and a cell separation layer, wherein the cell separation layer comprises a via coaxial and in fluid communication with the inner pump electrode, the diffusing limiting material, and the outer reference electrode, and wherein the diffusion limiting material has a gas permeability such that the limiting current of oxygen in air is about 0. 05 mA to about 5 mA per cmof pump electrode area.

US Patent:

7069770, Jul 4, 2006

Filed:

Aug 2, 2004

Appl. No.:

10/909552

Inventors:

David K. Chen - Rochester Hills MI, US
Raymond L. Bloink - Swartz Creek MI, US
Carlos A. Valdes - Flint MI, US
Eric L. Ker - Grand Blanc MI, US
Jinping Zhang - Grand Blanc MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

G01N 9/00

US Classification:

73 3105, 73 232

Abstract:

A sensor element can comprise a co-fired heater section, a sensing section, and a third insulating layer disposed between the electrode portion and the temperature sensor. The heater section can comprise a heater, a shield, and a temperature sensor, with a first insulating layer disposed between the heater and the shield, and a second insulating layer disposed between the shield and the temperature sensor. The sensing section can comprise an electrode portion and a sensing portion, wherein the sensing portion is disposed on a side of the electrode portion opposite the heater section.

US Patent:

7279133, Oct 9, 2007

Filed:

Dec 20, 2001

Appl. No.:

10/029049

Inventors:

David K. Chen - Rochester Hills MI, US
David P. Wallace - Davison MI, US
Da Yu Wang - Troy MI, US
Walter T. Symons - Grand Blanc MI, US
Paul C. Kikuchi - Fenton MI, US
Yingjie Lin - El Paso TX, US
Lora Thrun - Grand Blanc MI, US
Mark A. Shost - El Paso TX, US
Joseph G. Ralph - Owosso MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

B32B 5/02
B32B 27/12
B32B 27/04
G01N 27/00
G01N 27/26

US Classification:

422 98, 422 8201, 422 8202, 422 8204, 422 83, 436136, 204425, 204426, 204431

Abstract:

In a planar oxygen sensor having a pump cell, a reference cell, a sensor chamber and a heating device, a ground plane electrode is provided and includes a sensing portion having a first sense lead and a second sense lead and a measuring portion having a first measuring lead and a second measuring lead, wherein the first measuring lead and the second measuring lead have increased surface area relative to said sensing portion such that the resistance between the first measuring lead and the second measuring lead is reduced and wherein the first measuring lead is disposed so as to be communicated with the first sense lead and the second measuring lead is disposed so as to be communicated with the second sense lead. Also, in a planar oxygen sensor having a pump cell, a reference cell, a sensor chamber, a heating device and a ground plane electrode that includes a sensing portion having a first sense lead and a second sense lead and a measuring portion having a first measuring lead and a second measuring lead, a method for measuring the temperature of the planar oxygen sensor is provided and includes obtaining a temperature measurement device, communicating the temperature measurement device with the first measuring lead and the second measuring lead, operating the planar oxygen sensor so as to cause the heating device to heat the planar oxygen sensor, and measuring the resistance between the first measuring lead and the second measuring lead.

US Patent:

7491804, Feb 17, 2009

Filed:

Apr 21, 2003

Appl. No.:

10/511561

Inventors:

David J. Chen - Moraga CA, US
Ping-Chi Benjamin Chen - Walnut Creek CA, US
Doug W. Chan - Houston TX, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

C07K 16/40

US Classification:

53038823, 530327, 53038815

Abstract:

The identification and use of two major DNA-PKcs autophosphorylation sites. Threonine (T) 2609 and Serine (S) 2056, including antibodies specific for phosphorylated T2609 and 52056. Peptides and polynucleotides encoding same, that feature these two sites of phosphorylation. The antibodies do not bind to the unphosphorylated DNA-PKcs protein or peptide, thus providing diagnostic tools to monitor the effectiveness of treatments which target the DNA repair pathway of cancer cells, and the ability to intervene or inhibit in phosphorylation of T2609 or 52056, either through application of a drug or an antibody, to increase the radiosensitivity of cancer cells.

US Patent:

8141346, Mar 27, 2012

Filed:

Jan 31, 2007

Appl. No.:

11/669739

Inventors:

Furqan Zafar Shaikh - Troy MI, US
John Paul Bogema - Flat Rock MI, US
Michiel J. Van Nieuwstadt - Ann Arbor MI, US
Scott Donald Cooper - Ann Arbor MI, US
Garry Anthony Zawacki - Livonia MI, US
Jacobus Hendrik Visser - Farmington Hills MI, US
William Charles Ruona - Farmington Hills MI, US
Timothy Webb - Ann Arbor MI, US
Ed Kulik - Plymouth MI, US
David K. Chen - Rochester Hills MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F01N 3/00

US Classification:

60286, 60274, 60295, 60301, 60303

Abstract:

A method of operating an internal combustion engine having a reductant delivery and storage system in an emission control system, comprising of correlating a change in a monitored operating condition with a refill event to determine whether a reductant-diluting substance has been added to the reductant storage system; and limiting vehicle operation based on the correlation.

US Patent:

8321904, Nov 27, 2012

Filed:

Nov 5, 2008

Appl. No.:

12/264952

Inventors:

James Fan - San Ramon CA, US
Richard T. Kuo - Mountain View CA, US
David FengLin Chen - Fremont CA, US

Assignee:

AT&T Intellectual Property I, L.P. - Atlanta GA

International Classification:

H04N 7/173

US Classification:

725115, 725 93, 725 94

Abstract:

A provisioning system includes a services management system operable to enable a set-top box device configured to receive broadband services at a first network location to access one or more of the broadband services at a second network location. The first network location is associated with a subscriber account and the second network location is not associated with the subscriber account. The broadband services include a voice service, a data service, and a video service. The provisioning system includes a subscriber authentication system operable to evaluate a request that includes subscriber authorization data, to selectively authorize access to the one or more broadband services at the second network location based on the subscriber authorization data, and to enable the set-top box device to access the one or more broadband services when the set-top box device is at the second network location.