Thomas L O'Connor

US Patent:

20070087120, Apr 19, 2007

Filed:

Oct 18, 2005

Appl. No.:

11/253073

Inventors:

Donald Connors - Hudson NH, US
William Grant - Londonderry NY, US
Thomas O'Connor - Chelmsford MA, US
John Gordon - Nanaimo, CA
Raymond Loszewski - Windham NH, US

International Classification:

B05D 3/02

US Classification:

427228000

Abstract:

Fluid diffusion layers with favorable mechanical, physical and structural properties are prepared for fuel cell electrodes by: impregnating a porous carbonaceous web with a matrix comprising a polymer having pyrrolidone functionality and a high carbon char yield resin, such as activated aramid fiber pulp, lignins, phenolics, benzoxazines and phthalonitriles; and carbonizing the matrix. The polymer is optionally oxidized before carbonizing. The matrix may also include conductive fillers and/or pore formers. The fluid diffusion layers are particularly suitable for use in continuous roll-to-roll MEA processing of GDLs for use in solid polymer electrolyte fuel cells operating at high current densities and/or in highly humidified conditions.

US Patent:

53645715, Nov 15, 1994

Filed:

Feb 17, 1993

Appl. No.:

8/019366

Inventors:

Thomas J. O'Connor - Chelmsford MA
Mark J. Pistorino - Pelham NH
John J. Gaffney - N. Chelmsford MA
William T. Foulds - North Andover MA

Assignee:

Avco Corporation - Providence RI

International Classification:

C04B 3552
C04B 3564
B32B 1800

US Classification:

264 295

Abstract:

Net shape composite articles are made by a molding process. The molded preform is densified in a process where the rate of temperature increase is controlled to prevent distortion. The densified composite objects are impregnated with a secondary material to provide desirable properties such as strength, stiffness, or oxidation resistance. Diverse parts such as golf clubs and engine parts can be made by the process.