Patents by Inventor W. Mark Dutt

W. Mark Dutt 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: 5902684
    Abstract: A multilayer, thermoplastic stretch wrap film containing at least four polymeric film layers and comprised of a first outer cling layer, a second outer cling layer, at least one inner polymeric layer and at least one core layer. The first and second layers have a cling force to s each other of at least about 140 grams/inch. The stretch wrap film has at least one inner polymeric layer, located between the first and second layers. The inner polymeric layer comprises a low polydispersity polymer. The low polydispersity polymer has a polydispersity of from about 1 to about 4, a melt index (I.sub.2) of from about 0.5 to about 10 g/10 min., and a melt flow ratio (I.sub.20 /I.sub.2) of from about 12 to about 22. The core layer, also located between the outer cling layers, comprises either a random copolymer of propylene and ethylene, a heterophasic copolymer of propylene with domains of ethylene interspersed, a polypropylene homopolymer, or blends thereof.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: May 11, 1999
    Assignee: Tenneco Packaging Inc.
    Inventors: Edward M. Bullard, David V. Dobreski, George N. Eichbauer, Richard E. Leone, W. Mark Dutt