Patents by Inventor Julian Andrew Siodlak

Julian Andrew Siodlak 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).

  • Gas diffusion substrate
    Patent number: 8133306
    Abstract: A gas diffusion substrate includes a non-woven network of carbon fibres, the carbon fibres are graphitised but the non-woven network has not been subjected to a graphitisation process. A mixture of graphitic particles and hydrophobic polymer is disposed within the network. The longest dimension of at least 90% of the graphitic particles is less than 100 ?m. A process for manufacturing gas diffusion substrates includes depositing a slurry of graphitised carbon fibres onto a porous bed forming a wet fibre network, preparing a suspension of graphitic particles and hydrophobic polymer, applying onto, and pulling the suspension into, the network, and drying and firing the network. Another process includes mixing a first slurry of graphitic particles and hydrophobic polymer with a second slurry of graphitised carbon fibres and liquid forming a third slurry, depositing the third slurry onto a porous bed forming a fibre-containing layer, and drying and firing the layer.
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: March 13, 2012
    Assignees: Johnson Matthey Public Limited Company, Technical Fibre Products Limited
    Inventors: George Thomas Quayle, Julia Margaret Rowe, Jonathan David Brereton Sharman, Julian Andrew Siodlak, Nigel Julian Walker, Andrew James Fletcher
  • Gas Diffusion Substrate
    Publication number: 20080268297
    Abstract: A gas diffusion substrate includes a non-woven network of carbon fibres, the carbon fibres are graphitised but the non-woven network has not been subjected to a graphitisation process. A mixture of graphitic particles and hydrophobic polymer is disposed within the network. The longest dimension of at least 90% of the graphitic particles is less than 100 ?m. A process for manufacturing gas diffusion substrates includes depositing a slurry of graphitised carbon fibres onto a porous bed forming a wet fibre network, preparing a suspension of graphitic particles and hydrophobic polymer, applying onto, and pulling the suspension into, the network, and drying and firing the network. Another process includes mixing a first slurry of graphitic particles and hydrophobic polymer with a second slurry of graphitised carbon fibres and liquid forming a third slurry, depositing the third slurry onto a porous bed forming a fibre-containing layer, and drying and firing the layer.
    Type: Application
    Filed: June 15, 2005
    Publication date: October 30, 2008
    Applicants: Johnson Matthey Public Limited Company, Technical Fibre Products Limited
    Inventors: George Thomas Quayle, Julia Margaret Rowe, Jonathan David Brereton Sharman, Julian Andrew Siodlak, Nigel Julian Walker