Patents by Inventor Douglas E. Ellis

Douglas E. Ellis 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).

  • Porous low density shot-like degradable absorbent materials and manufacturing process therefor
    Patent number: 5358607
    Abstract: Degradable particulate absorbent materials and processes for manufacture, wherein the absorbent materials have: i) in most forms of the invention, on the order of not more than 10% by weight inorganic solids or "fillers" and in all cases less than 30% inorganic solids by weight; ii) an open, porous, shot-like fiber structure with low bulk density on the order of not more than 30 lbs./ft..sup.3 and, preferably, in the range of 15 to 18 lbs./ft..sup.3.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: October 25, 1994
    Inventor: Douglas E. Ellis