Patents by Inventor Don T. Ras

Don T. Ras 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).

  • Patent number: 5320679
    Abstract: A criss cross coating hopper 10 is provided which is capable of producing uniform flow distribution patterns. The hopper 10 is comprised of a first and second hopper halves 12,14. First and second hopper halves 12,14 each have a first and second planar surface 20,40, respectively, adjoining a first and second cavity 22,42, respectively, each cavity 22,42 having a land surface 28,50 near the entrance end 26,48 and exit end 24,46. Inserts 62,64 are positioned against the land surface 60 of the first hopper half 12 and the land surface 50 of the second hopper half 14, respectively. The first and second hopper halves 12,14 and the inserts 62,64 cooperate to form an exit slot 69 recessed into first and second planar surfaces 20,40.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: June 14, 1994
    Assignee: Eastman Kodak Company
    Inventors: Stephen J. Derezinski, Don T. Ras, Brian M. Fauci