Todd G White

US Patent:

RE39191, Jul 18, 2006

Filed:

Feb 14, 2002

Appl. No.:

10/075944

Inventors:

Eric M. Nelson - Binningen, CH
Todd C. White - San Diego CA, US

International Classification:

G01N 33/48

US Classification:

422 58, 422 56, 436169, 436 63, 264442, 264603

Abstract:

The present invention provides a method of sonic treatment to selectively reduce the void volume of a sintered polymer such as porous high density polyethylene (HDPE). The invention also provides a method and an article of manufacture for receiving a liquid sample, where a first portion of the sintered polymer (1a) overlies a solid surface (4a) and a second portion of the polymer (1b) overlies a window (4b). Sonic treatment of the sintered polymer reduces the void volume of the first portion (1a) compared to the second portion (1b). As a result, a liquid sample applied to the polymer will preferentially migrate through the second portion (1b), rather than through the first portion (1a). When the article of manufacture is used to analyze a liquid sample such as blood, less sample is required because of the preferential migration in the sonically treated sintered polymer.

US Patent:

60249196, Feb 15, 2000

Filed:

Jan 14, 1998

Appl. No.:

9/006787

Inventors:

Eric M. Nelson - San Clemente CA
Todd C. White - San Diego CA

Assignee:

LXN Corporation - San Diego CA

International Classification:

G01N 3348

US Classification:

422 58

Abstract:

The present invention provides a method of sonic treatment to selectively reduce the void volume of a sintered polymer such as porous high density polyethylene (HDPE). The invention also provides a method and an article of manufacture for receiving a liquid sample, where a first portion of the sintered polymer (1a) overlies a solid surface (4a) and a second portion of the polymer (1b) overlies a window (4b). Sonic treatment of the sintered polymer reduces the void volume of the first portion (1a) compared to the second portion (1b). As a result, a liquid sample applied to the polymer will preferentially migrate through the second portion (1b), rather than through the first portion (1a). When the article of manufacture is used to analyze a liquid sample such as blood, less sample is required because of the preferential migration in the sonically treated sintered polymer.