David Chan

US Patent:

20030068266, Apr 10, 2003

Filed:

Apr 5, 2002

Appl. No.:

10/117921

Inventors:

Shiho Wang - Lake Forest CA, US
Yasar Halefoglu - Aliso Viejo CA, US
Chih-hsing Cheng - Fullerton CA, US
Dengfeng Xu - Irvine CA, US
David Nung Chan - Fountain Valley CA, US
Meng-ying Chen - Taipei, TW
Chinh Do - Westminster CA, US

International Classification:

C01B033/12

US Classification:

423/338000

Abstract:

A method of manufacturing a xerogel monolith having a pore diameter distribution includes preparing a first solution comprising metal alkoxide and preparing a second solution comprising a catalyst. A third solution is prepared by mixing the first solution and the second solution together. At least one of the first, second, and third solutions is cooled to achieve a mixture temperature for the third solution which is substantially below room temperature, wherein the third solution has a significantly longer gelation time at the mixture temperature as compared to a room temperature gelation time for the third solution. The method further includes allowing the third solution to gel, thereby forming a wet gel monolith. The method further includes forming the xerogel monolith by drying the wet gel monolith.

US Patent:

20030069122, Apr 10, 2003

Filed:

Oct 9, 2001

Appl. No.:

09/974725

Inventors:

Shiho Wang - Lake Forest CA, US
Yasar Halefoglu - Aliso Viejo CA, US
Chih-hsing Cheng - Fullerton CA, US
Dengfeng Xu - Irvine CA, US
David Chan - Fountain Valley CA, US
Meng-ying Chen - Taipei, TW
Chinh Do - Westminster CA, US

International Classification:

C03C003/00
C01B033/152

US Classification:

501/012000, 516/098000, 516/111000

Abstract:

A method of forming a gel monolith includes preparing a first solution comprising metal alkoxide and preparing a second solution comprising a catalyst. A third solution is prepared by mixing the first solution and the second solution together. At least one of the first, second, and third solutions is cooled to achieve a mixture temperature for the third solution which is substantially below room temperature, wherein the third solution has a significantly longer gelation time at the mixture temperature as compared to a room temperature gelation time for the third solution. The method further includes allowing the third solution to gel, thereby forming the gel monolith.

US Patent:

20030078153, Apr 24, 2003

Filed:

Aug 7, 2002

Appl. No.:

10/215353

Inventors:

Shiho Wang - Lake Forest CA, US
Yasar Halefoglu - Aliso Viejo CA, US
Chih-hsing Cheng - Fullerton CA, US
Dengfeng Xu - Irvine CA, US
David Nung Chan - Fountain Valley CA, US
Meng-ying Chen - Taipei, TW
Chinh Do - Westminster CA, US

International Classification:

C03C003/00
C01B033/152

US Classification:

501/012000, 516/111000, 516/098000

Abstract:

A method of preparing a solution for forming a doped gel monolith includes providing a first substance including a metal alkoxide. The method further includes providing a second substance including a catalyst. The method further includes providing a chemical including a dopant. The method further includes forming a solution including the dopant, said forming including mixing the first substance and the second substance together. The method further includes cooling the solution to a mixture temperature which is at or below zero degrees Celsius, wherein the solution has a significantly longer gelation time at the mixture temperature than at room temperature.

US Patent:

20060083914, Apr 20, 2006

Filed:

Apr 26, 2005

Appl. No.:

11/115071

Inventors:

Shiho Wang - Lake Forest CA, US
Yasar Halefoglu - Aliso Viejo CA, US
Chih-hsing Cheng - Fullerton CA, US
Dengfeng Xu - Irvine CA, US
David Chan - Fountain Valley CA, US
Meng-ying Chen - Taipei, TW
Chinh Do - Westminster CA, US

International Classification:

B32B 3/26
C08G 77/06
C08L 83/00

US Classification:

428312600, 528012000

Abstract:

A method of manufacturing a xerogel monolith having a pore diameter distribution includes preparing a first solution comprising metal alkoxide and preparing a second solution comprising a catalyst. A third solution is prepared by mixing the first solution and the second solution together. At least one of the first, second, and third solutions is cooled to achieve a mixture temperature for the third solution which is substantially below room temperature, wherein the third solution has a significantly longer gelation time at the mixture temperature as compared to a room temperature gelation time for the third solution. The method further includes allowing the third solution to gel, thereby forming a wet gel monolith. The method further includes forming the xerogel monolith by drying the wet gel monolith.

US Patent:

50527029, Oct 1, 1991

Filed:

Jun 5, 1990

Appl. No.:

7/533447

Inventors:

David M. Chan - San Gabriel CA

International Classification:

A63O 1702

US Classification:

280 1128

Abstract:

A toy skateboard is provided with steerable truck assemblies having a minimum of parts. Two longitudinally spaced pivots on the underside of the platform hold the trucks on the platform. A leaf spring with three prongs is placed between each truck and the platform. One or more of the prongs are bent away from the plane of the body of the spring with the two outer prongs always located in the same direction. The diameter of the pivots is less than the diameter of the holes through the trucks allowing the trucks to be tilted in any direction about the pivots. Limit walls molded on the undersurface of the platform limit the rotation of the trucks about the pivots. When the platform is tilted, the springs push the trucks out of the straight forward position into the direction of the tilt thereby mimicking the action of a full sized skateboard.

US Patent:

49307940, Jun 5, 1990

Filed:

Aug 29, 1988

Appl. No.:

7/237709

Inventors:

David M. Chan - San Gabriel CA

International Classification:

A63L 1702

US Classification:

280 1128

Abstract:

A toy skateboard is provided with steerable truck assemblies having a minimum of parts. Two longitudinally spaced pivots on the underside of the platform hold the trucks on the platform. A leaf spring with three prongs is placed between each truck and the platform. One or more of the prongs are bent away from the plane of the body of the spring with the two outer prongs always located in the same direction. The diameter of the pivots is less than the diameter of the holes through the trucks allowing the trucks to be tilted in any direction about the pivots. Limit walls molded on the undersurface of the platform limit the rotation of the trucks about the pivots. When the platform is tilted, the springs push the trucks out of the straight forward position into the direction of the tilt thereby mimicking the action of a full sized skateboard.

US Patent:

D3114511, Oct 23, 1990

Filed:

Aug 8, 1988

Appl. No.:

7/229487

Inventors:

David M. Chan - San Gabriel CA

US Classification:

D 3 62

US Patent:

20160283692, Sep 29, 2016

Filed:

Jul 23, 2015

Appl. No.:

14/807144

Inventors:

- Danbury CT, US
David Shoichi Chan - Los Angeles CA, US

International Classification:

G06F 19/00

Abstract:

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for linking a first electronic data set to a second set of data fields in a second electronic data set. Automatically identifying a prescribing physician identifier based on the linked first and second electronic data sets. Determining a relationship between a physician associated with the prescribing physician identifier and at least one of the approved entities based on comparing the prescribing physician identifier and identifiers of the one or more approved entities to a fourth set of data fields from a fourth electronic data set. Automatically generating an electronic notification indicating that a product sold by the merchant is eligible for the discount in response to determining a relationship between a physician and the at least one of the approved entities.