Patents by Inventor Donald J. Ralph

Donald J. Ralph 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).

  • Multilayer stretch/shrink film
    Patent number: 5279872
    Abstract: A biaxially oriented heat shrinkable multilayer stretch film useful as a trayed poultry overwrap includes outer layers each comprising a blend of VLDPE (density below about 0.914 g/cm.sup.3 and an ethylene alpha-olefin plastomer (density below about 0.90 g/cm.sup.3).
    Type: Grant
    Filed: February 17, 1993
    Date of Patent: January 18, 1994
    Assignee: Viskase Corporation
    Inventor: Donald J. Ralph
  • Multilayer stretch/shrink film
    Patent number: 5272016
    Abstract: A biaxially oriented heat shrinkable multilayer stretch film useful as a trayed poultry overwrap includes outer layers each comprising a blend of VLDPE (density below about 0.914 g/cm.sup.3 and an ethylene alpha-olefin plastomer (density below about 0.90 g/cm.sup.3).
    Type: Grant
    Filed: February 19, 1993
    Date of Patent: December 21, 1993
    Assignee: Viskase Corporation
    Inventor: Donald J. Ralph