Patents by Inventor David L. Diggs

David L. Diggs 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).

  • Cross reference to related applications
    Publication number: 20040195544
    Abstract: The present invention describes halogenated alkane fire extinguishing compositions consisting essentially of 1,1,1,3,3-pentafluoro propane, optionally pentafluoro ethane, and optionally one or more fire extinguishing fluoro- or chlorfluoroalkanes.
    Type: Application
    Filed: March 19, 2004
    Publication date: October 7, 2004
    Inventors: Robert G. Richard, David L. Diggs, George A. Shia
  • Method of deacidifying cellulose-based materials
    Publication number: 20030150571
    Abstract: Provided are methods of deacidifying a cellulose-based material by providing a deacidification composition comprising a hydrofluorocarbon and a deacidification agent dispersed within the hydrofluorocarbon, and contacting the cellulose-based material with the composition to increase the pH associated with the cellulose-based material. Also provided are deacidification compositions for use in the present methods.
    Type: Application
    Filed: November 18, 2002
    Publication date: August 14, 2003
    Inventors: Raymond H. Thomas, David L. Diggs