Patents by Inventor Philip Pennicott

Philip Pennicott 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).

  • Filtering particulate cellulosic-based material
    Patent number: 5421525
    Abstract: A method is provided for filtering shredded cellulose-based material, for example to enable the formation of a mixture containing cellulose dispersed in a solvent for cellulose such as amine oxide. The shredding operation creates both fine particles of cellulosic material ("pulp dust") and large particles of cellulosic material, The shredded cellulosic material is passed through a separator to separate the pulp dust from the large particles of cellulosic material and the pulp dust is subsequently recovered in a filtering process.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: June 6, 1995
    Assignee: Courtaulds Fibres (Holdings) Limited
    Inventors: Gary E. G. Gray, Philip Pennicott
  • Filtering particulate cellulosic-based material
    Patent number: 5370322
    Abstract: A method is provided for filtering shredded cellulose-based material, for example to enable the formation of a mixture containing cellulose dispersed in a solvent for cellulose such as amine oxide. The shredding operation creates both fine particles of cellulosic material ("pulp dust") and large particles of cellulosic material. The shredded cellulosic material is passed through a separator to separate the pulp dust from the large particles of cellulosic material and the pulp dust is subsequently recovered in a filtering process.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: December 6, 1994
    Assignee: Courtaulds Fibres (Holdings) Limited
    Inventors: Gary E. G. Gray, Philip Pennicott