Patents by Inventor Duarte R. Sousa

Duarte R. Sousa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Impregnation of porous substrates
    Publication number: 20040076753
    Abstract: Methods and apparatus are disclosed for impregnating a resiliently compressible, porous substrate with a material by: compressing the substrate through a calendering apparatus; contacting the compressed substrate with a fluid comprising the material; maintaining the calendered substrate in contact with the fluid while the calendered substrate expands, thereby impregnating the substrate with the material; and drying the impregnated substrate. Such impregnated substrates find particular application as gas diffusion layers for anodes and cathodes used in fuel cells.
    Type: Application
    Filed: September 25, 2002
    Publication date: April 22, 2004
    Applicant: Ballard Power Systems Inc.
    Inventor: Duarte R. Sousa