Patents by Inventor Sumner Sheldon Feinstein

Sumner Sheldon Feinstein 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 making egg cartons
    Patent number: 3950208
    Abstract: A foamed plastic sheet is perforated medially before it is heated in an oven following which, it is conveyed between a pair of matching molds where a quad of egg cartons is formed in an upside down condition with locking lugs of a pair of cartons on one side of the perforated line facing the lugs of the other pair across the perforated line. Perforation of the sheet is made to relieve stress in the region where the lugs are formed.
    Type: Grant
    Filed: August 17, 1973
    Date of Patent: April 13, 1976
    Assignee: Borden, Inc.
    Inventors: Frank Eugene Pavuk, Roger Henry Steiner, Sumner Sheldon Feinstein, Richard Joseph Venuti