Patents by Inventor Renato Angelo Colnaghi

Renato Angelo Colnaghi 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).

  • Thermoformable multi-layer polypropylene foam sheet
    Patent number: 6773796
    Abstract: A thermoformable, multilayer, co-extruded sheet comprising at least two separate foam polypropylene layers obtained by chemical foaming of two polyproplene resins having different flexural modulus, a “high modulus” polypropylene and a “low modulus” polypropylene. The presence of two different foam layers of polypropylene of different modulus allows obtaining a thermoformable sheet with the desired balance between thermoformability and stiffness.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: August 10, 2004
    Assignee: Cryovac, Inc.
    Inventors: Gregorio Di Cesare, Renato Angelo Colnaghi