David D Lambert

US Patent:

20020058179, May 16, 2002

Filed:

Sep 10, 2001

Appl. No.:

09/948791

Inventors:

Paul Segit - Exeter NH, US
David Lambert - Somersworth NH, US

International Classification:

H01M004/66
H01M004/88
B32B027/12

US Classification:

429/044000, 429/245000, 427/115000, 502/101000, 428/297400

Abstract:

The present invention provides a flexible pyrolyzed carbon fiber matrix, suitable for use as a fuel cell electrode substrate. The product is characterized by controlled microporosity and is at least partially hydrophobic. The product is made by a continuous, high speed, high volume manufacturing process, which permits wide variability in such parameters as basis weight (50-150 gm/m), caliper (140-400 mat 5 Kpa), density (0.300-0.480 gm/cm), and resistivity (200-1000 mOhm-cm through plane and 15-65 mOhm-cm in plane). This matrix, unlike current electrode substrates, is flexible and can be made as roll goods. Comparative testing in fuel cell applications has demonstrated that this electrode substrate performs comparably to currently available electrode substrates. A fuel cell equipped with the present electrode substrate will produce a polarization curve which is virtually the same as that produced by a fuel cell equipped with a conventional electrode substrate.

US Patent:

55956599, Jan 21, 1997

Filed:

Feb 17, 1995

Appl. No.:

8/390672

Inventors:

Ming-Teh Huang - Durham NH
David R. Lambert - Somersworth NH
Robert F. Gatta - Durham NH
Kevin G. Lynch - Hampton NH

Assignee:

Lydall, Inc. - Manchester CT

International Classification:

B01D 3902

US Classification:

2105021

Abstract:

A filter material for removing chlorine from cold water used in preparing a human-consumable beverage having at least one layer of a mat of laid fibers of cellulosic fibers and synthetic textile fibers and mixtures thereof. A synthetic hydrophilic, food-grade latex binder deposited onto the fibers within the mat in an amount sufficient to so bind the fibers together within the mat that during a filtration of cold water through the mat no substantial amount of fibers are displaced therefrom and in an amount insufficient to substantially reduce a gravity flow rate of cold water through the mat to less than about 0. 3 liter per minute per 100 square centimeters of the mat. A water-insoluble chlorine adsorbent or absorbent solid powder disposed on the binder such that no more than 65% of the total outside surface area of the powder is substantially contacted by the binder.