Abstract: A bipolar plate for use with a fuel cell is provided including an electrically conductive foam as a coolant layer between thin metal foil layers. The thin metal foil layers are provided with serpentine flow field patterns on a surface thereof.

Abstract: A proton exchange membrane fuel cell including a membrane electrode assembly comprising a proton transmissive membrane, a catalytic anode layer on one face of the membrane, and a catalytic cathode layer on the other face of the membrane. The fuel cell further includes a gas distribution layer on each of the cathode and anode layers defining a gas flow field extending over each of the catalytic layers. The membrane electrode assembly has a convoluted configuration whereby to increase the ratio of membrane area to planar fuel cell area and thereby increase the electrical output of the fuel cell for a given planar area size fuel cell. The convoluted configuration of the membrane electrode assembly also facilitates the division of the gas distribution layers into separate parallel channels thereby allowing the use of an inexpensive foam material for the gas distribution layers irrespective of the inherent variations in porosity of foam materials.

Abstract: A proton exchange membrane fuel cell comprising a proton transmissive membrane, a catalytic anode layer on one face of the membrane, a catalytic cathode layer on the other face of the membrane, and a gas distribution layer on each of the cathode and anode layers defining a gas flow field extending over each of the catalytic layers. Each of the gas distribution layers comprises a layer of open cell conductive foam material which is divided into a plurality of generally parallel segments extending from one edge of the fuel cell to an opposite edge of the fuel cell whereby to define a plurality of generally parallel porous reactant paths extending across each catalytic layer. The segments may be defined by selectively varying the porosity of the foam material or selectively varying the thickness of the foam material.

Abstract: An imaging support comprising: a polyester base having two sides; and an electrically conductive layer superposed on one side of the base, wherein the electrically conductive layer comprises electrically conductive metal-containing fine particles dispersed in a blend of a polyurethane binder and a hydrophilic cobinder; wherein the polyurethane binder is an aliphatic, anionic polyurethane having an ultimate elongation to break of at least 350 percent.

Abstract: A photographic support comprising; a polyester base having a first and a second side; an antistatic layer superposed on the first side of the base; a gelatin layer superposed on the second side of the base; and an auxiliary layer overlying said antistatic layer comprising 20 to 80 percent by weight hydroxypropyl methyl cellulose and a second binder.

Abstract: A photographic support comprising; a polyester base having a first and a second side; an antistatic layer superposed on the first side of the base; a gelatin layer superposed on the second side of the base; and an auxiliary layer overlying said antistatic layer comprising 20 to 80 percent by weight hydroxypropyl methyl cellulose and a second binder.

Abstract: An imaging support comprising: a polyester base having two sides; and an electrically conductive layer superposed on one side of the base; wherein the electrically conductive layer comprises electrically conductive metal-containing fine particles dispersed in a blend of a polyurethane binder and a hydrophilic cobinder; wherein the polyurethane binder is an aliphatic, anionic polyurethane having an ultimate elongation to break of at least 350 percent.

Abstract: A photographic element comprising a polyester support; an antistatic layer; and a transparent magnetic layer comprising a cellulose binder, ferromagnetic particles and a blocked isocyanate.

Abstract: A fuel cell of the type having a membrane electrode assembly (MEA) interdisposed between a pair of bipolar plate assemblies. The MEA may have a convoluted configuration to maximize the effective surface area of the MEA for a given planar area. Each bipolar plate assembly includes a gas distribution layer of open cell conductive foam material which is divided into a plurality of generally parallel segments to define a plurality of generally parallel porous reactant paths. The segments are defined by selectively varying the porosity of the foam material and/or selectively varying the thickness of the foam material. The foam material may be a conductive graphite foam media or a conductive metallic foam media. Each bipolar plate assembly further includes a non-porous, conductive separator plate. The bipolar plate assembly distributes the reactant gases delivered via a manifold structure across the face of the MEA.

Abstract: A photographic element comprising a polyester support; an antistatic layer; and a transparent magnetic layer comprising a cellulose binder, ferromagnetic particles and a blocked isocyanate.

Abstract: A PEM fuel cell having electrical contact elements comprising a corrosion-susceptible substrate metal coated with an electrically conductive, corrosion-resistant polymer containing a plurality of electrically conductive, corrosion-resistant filler particles. The substrate may have an oxidizable metal first layer (e.g., stainless steel) underlying the polymer coating.

Abstract: A photographic element comprising a polyester support; an antistatic layer; and a transparent magnetic layer comprising a cellulose binder, ferromagnetic particles and a blocked isocyanate.

Abstract: An imaging element such as a photographic, electrostatic, or thermal imaging element is comprised of a support, an image-forming layer, and a transparent electrically conductive layer which includes an effective amount of poly(3,4-ethylene dioxypyrrole/styrene sulfonate). In a preferred embodiment, the poly(3,4-ethylene dioxypyrrole/styrene sulfonate) is dispersed in a polymeric binder.