Patents by Inventor Stuart Greenberg

Stuart Greenberg 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 of manufacturing substantially pure rawhide pet products
    Patent number: 5635237
    Abstract: A substantially pure rawhide product and a mechanical method for manufacturing a substantially pure rawhide treat or chew for pets utilizing a double screw extruder with a number of heating zones and interchangeable extrusion dies. The method allows for the use of wet rawhide or rawhide scraps and contemplates the addition of various additives to the rawhide product. Also claimed is a double screw extruder especially adapted for the preparation of substantially pure rawhide treats.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: June 3, 1997
    Assignee: Rawhide Select
    Inventors: Stuart Greenberg, Guy Fere, Albertine Sharples