Patents by Inventor David Michael Marotta

David Michael Marotta 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: 5888640
    Abstract: A metallized uniaxially heat-shrinkable, biaxially oriented, multilayer film having a polypropylene-containing core layer comprising at least 70 wt. % of said multilayer film and at least one polyolefin-containing skin layer adjacent said core layer is prepared by biaxially orienting a coextrudate and thereafter orienting said coextrudate by stretching 10 to 40% in the machine direction. The core layer contains isotactic polypropylene and a modifier which reduces the crystallinity of the polypropylene by increasing chain imperfections or reducing isotacticity of the polypropylene-containing core. Such modifiers can be selected from the group consisting of atactic polypropylene, syndiotactic polypropylene, ethylene-propylene copolymer, propylene-butene-1 copolymer, ethylene-propylene-butene-1 terpolymer, and linear low density polyethylene. The skin layer can be high density polyethylene or ethylene-propylene-butene-1 terpolymer.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: March 30, 1999
    Assignee: Mobil Oil Corporation
    Inventors: David Michael Marotta, Walter W. Szkapi, David Randall Williams