Patents by Inventor Malcolm Edward Sumner

Malcolm Edward Sumner 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).

  • Process for making an animal litter comprising gypsum, aluminum sulfate and urea
    Patent number: 6206947
    Abstract: There is provided an animal litter composition of agglomerated or compacted calcined calcium sulfate absorbent. The animal litter is screened to a particle size between 6 mesh and about 100 mesh. In another aspect of the invention, an effective amount of a binder such as a clay, lignin or starch is added to the calcium sulfate to assist the calcium sulfate to pelletize. The pelletized calcium sulfate is sized and calcined. The litter compositions are effective in absorbing urine, clumping and are easily disposed of. There is also disclosed processes for making the animal litter compositions.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: March 27, 2001
    Assignee: Waste Reduction Products Corp.
    Inventors: Donald Frederick Evans, Richard Binion Steele, Malcolm Edward Sumner
  • Animal litter comprising gypsum and aluminum sulfate and processes of making same
    Patent number: 6029603
    Abstract: There is provided an animal litter composition of agglomerated or compacted calcined calcium sulfate absorbent. The animal litter is screened to a particle size between 6 mesh and about 100 mesh. In another aspect of the invention, an effective amount of a binder such as a clay, lignin or starch is added to the calcium sulfate to assist the calcium sulfate to pelletize. The pelletized calcium sulfate is sized and calcined. The litter compositions are effective in absorbing urine, clumping and are easily disposed of. There is also disclosed processes for making the animal litter compositions.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: February 29, 2000
    Assignee: Waste Reduction Products Corporation
    Inventors: Donald Frederick Evans, Richard Binion Steele, Malcolm Edward Sumner