Patents by Inventor Steven C. Brandon

Steven C. Brandon 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).

  • Method for improving filter efficiency
    Patent number: 5308494
    Abstract: The invention is directed to a method for improving the filtration efficiency of an altered substrate filter element comprising a porous solid substrate, one side of which is impregnated with sintered solid particles, by treating the solids-oxide-impregnated side with an aqueous suspension of small non-agglomerated solid particles which are deposited upon the sintered solid particles.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: May 3, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Steven C. Brandon, Roy Segars, Jr.
  • Filtration device having hardened gum formed-in-place membranes
    Patent number: 5043069
    Abstract: Stable formed-in-place saccharinic gum membranes on a porous support, the membranes being modified by contact with at least an equivalent of multivalent cations to anionic groups in the gum.
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: August 27, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Steven C. Brandon, Harold G. Spencer