Patents by Inventor Craig Lawrence Sandford

Craig Lawrence Sandford 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: 6045882
    Abstract: A multilayer, biaxially stretched, flexible, hermoplastic film having at least three (preferably five) layers (a), (b), and (c) with layer (b) disposed between layers (a) and (c), layers (a) and (c) each being a blend of at least 45% of a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, having a density of 0.900 g/cm.sup.3 to <0.915 g/cm.sup.3, and a melting point between 85.degree. C. and 125 .degree. C. with at least 5% of a high density polyethylene, and layer (b) being at least 45% of a copolymer of ethylene and at least one C.sub.3 -C.sub.10 .alpha.-olefin, having a density of 0.900 g/cm.sup.3 to <0.915 g/cm.sup.3, and a melting point of 85.degree. C.-125.degree. C., the film being 50.8 micrometers(.mu.) or less in thickness, and having a shrinkage value of at least 60% in at least one direction at 127.degree. C., and a process for making the film.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: April 4, 2000
    Assignee: Viskase Corporation
    Inventor: Craig Lawrence Sandford