Randy D Murphy

US Patent:

6688476, Feb 10, 2004

Filed:

Feb 27, 2002

Appl. No.:

10/084605

Inventors:

John C Burnham - Lake Zurich IL
Allen R Wons - Antioch IL
Randy Murphy - Pleasant Prairie WI
Daryl R Calhoun - Green Oaks IL
Daniel R Lynn - Spring Grove IL

Assignee:

Baxter International Inc. - Deerfield IL

International Classification:

B01D 2708

US Classification:

210435, 210232, 210252, 422101, 422102, 604408

Abstract:

A fluid filter assembly for filtering fluids such as blood is described. The assembly includes first and second filter housing elements formed by an injection molding process. Each element is flexible and includes a peripheral flange formed thereabout and a fluid communicating port formed therein. Filter media, such as a filter membrane, is sealed between the mating flanges of two elements. The fluid filter assembly is capable of collapsing and expanding during the filtration process depending upon the composition of the fluid passed there through. A method for making the filter assembly and systems for using the filter assembly are also disclosed.

US Patent:

7278541, Oct 9, 2007

Filed:

Jan 26, 2004

Appl. No.:

10/764630

Inventors:

John C Burnham - Lake Zurich IL, US
Allen R Wons - Antioch IL, US
Randy Murphy - Pleasant Prairie WI, US
Daryl R Calhoun - Green Oaks IL, US
Daniel R Lynn - Spring Grove IL, US

Assignee:

Fenwal, Inc. - Lake Zurich IL

International Classification:

B01D 35/00
B32B 37/00
B32B 37/06
B29C 65/02
B29C 65/04

US Classification:

210435, 210232, 422101, 422102, 604408, 1562722, 1562737, 1563046, 1563796, 531331, 53479

Abstract:

A method of making a blood filter assembly provides first and second filter housing elements from a flexible thermoplastic material, each of the first and second housing elements including a molded port. The method places a filter media between the first and second filter housing elements and applies radio frequency heating and pressure to form a peripheral seal that joins the first and second filter housing elements to the filter media and encapsulates the filter media between the first and second housing elements.