Patents Represented by Attorney, Agent or Law Firm Cedric M. Richeson
  • Patent number: 5698279
    Abstract: Tubular, biaxially stretched, heat shrinkable multilayer film food casings comprising inner and outer polyamide layers on either side of a core layer predominantly of one or more ethylenic polymers having a functional moiety selected from the group of esters, anhydrides, and carboxylic acids, and a coextrusion process for making the film.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: December 16, 1997
    Assignee: Viskase Corporation
    Inventor: Stephen James Vicik
  • Patent number: 5635261
    Abstract: A biaxially stretched, heat sealable, thermoplastic, flexible, food packaging film, preferably multilayer, having an outer heat sealable layer comprising an ethylene vinyl ester copolymer, preferably a blend of two different EVA copolymers wherein said heat sealing layer (which is preferably crosslinked by irradiation) has an M.sub.w of 50,000 or more, and an M.sub.n between 1000 and 18,000.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: June 3, 1997
    Assignee: Viskase Corporation
    Inventors: Paul N. Georgelos, Stanley Lustig
  • Patent number: 5614297
    Abstract: A polyolefin blown or slot cast monolayer or multilayer stretch film useful as a trayed overwrap e.g. for fresh red meat includes at least three layers in the multilayer embodiment each of which contains an ethylene alpha-olefin copolymer having a density below 0.915 g/cm.sup.3 and having a melting point of at least 90.degree. C. with at least one outer layer and preferably also the first outer layer or the core layer having a second ethylene alpha olefin copolymer having a melting point less than 80.degree. C. blended therein.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: March 25, 1997
    Assignee: Viskase Corporation
    Inventor: Alberto Velazquez
  • Patent number: 5573797
    Abstract: An antimicrobial composition comprising a Streptococcus-derived or Pediococcus-derived bacteriocin or synthetic equivalent antibacterial agent in combination with a chelating agent. Such composition may be used in conjunction with a foodstuff or with a food packaging film.(with or without the chelating agent) to protect foodstuffs against growth of harmful bacteria such as Listeria. Also disclosed are methods of protecting foodstuffs using film having a transferrable antimicrobial agent which may protect foodstuff surfaces before and/or following removal of the film and peelable films useful in such methods which may include the above bacteriocin.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: November 12, 1996
    Assignee: Viskase Corporation
    Inventor: Darrel L. Wilhoit
  • Patent number: 5573801
    Abstract: An antimicrobial composition comprising a Streptococcus-derived or Pediococcus-derived bacteriocin or synthetic equivalent antibacterial agent in combination with a chelating agent. Such composition may be used in conjunction with a foodstuff or with a food packaging film (with or without the chelating agent) to protect foodstuffs against growth of harmful bacteria such as Listeria. Also disclosed are methods of protecting foodstuffs using film having a transferrable antimicrobial agent which may protect foodstuff surfaces before and/or following removal of the film and peelable films useful in such methods which may include the above bacteriocin.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: November 12, 1996
    Assignee: Viskase Corporation
    Inventor: Darrel L. Wilhoit
  • Patent number: 5573800
    Abstract: An antimicrobial composition comprising a Pediococcus-derived bacteriocin or synthetic equivalent antibacterial agent in combination with a chelating agent. Such composition may be used in conjunction with a foodstuff or with a food packaging film (with or without the chelating agent) to protect foodstuffs against growth of harmful bacteria such as Listeria. Also disclosed are methods of protecting foodstuffs using film having a transferrable antimicrobial agent which may protect foodstuff surfaces before and/or following removal of the film and peelable films useful in such methods which may include the above bacteriocin.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: November 12, 1996
    Assignee: Viskase Corporation
    Inventor: Darrel L. Wilhoit
  • Patent number: 5549943
    Abstract: Tubular, biaxially stretched, heat shrinkable multilayer film food casings comprising inner and outer polyamide layers on either side of a core layer predominantly of one or more polyolefins such as VLDPE or EVA and a coextrusion process for making the film.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: August 27, 1996
    Assignee: Viskase Corporation
    Inventor: Stephen J. Vicik
  • Patent number: 5480945
    Abstract: Novel orientable single and multilayer thermoplastic flexible films utilizing blends comprising an amorphous nylon copolymer such as nylon 6I/6T and a nylon copolyamide having a melting point of at least about 145.degree. C. having improved processability, shrinkage and optical properties.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: January 2, 1996
    Assignee: Viskase Corporation
    Inventor: Stephen J. Vicik
  • Patent number: 5470519
    Abstract: A method of manufacturing a cellulosic article of cellulose or a cellulose derivative that has incorporated a polyethylene oxide composition having a molecular weight of at least 70,000.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: November 28, 1995
    Assignee: Viskase Corporation
    Inventor: John Markulin
  • Patent number: 5439717
    Abstract: Heat-shrinkable films suitable for packaging food articles such as frozen poultry, primal meat cuts, and processed meat products. In one embodiment, the film may be a biaxially stretched monolayer film of a very low density polyethylene copolymer. In another embodiment, the film may be a biaxially stretched multilayer film comprising a first outer layer of an ethylene-vinyl acetate copolymer, a core layer of a barrier film such as a polyvinylidene chloride copolymer or an ethylene-vinyl alcohol copolymer, and a second outer layer comprising a blend of an ethylene-vinyl acetate copolymer and a very low density polyethylene copolymer. The multilayer film is preferably made by coextrusion of the layers. The films are fabricated into bags useful for the aforementioned purposes. The bags have improved toughness.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: August 8, 1995
    Assignee: Viskase Corporation
    Inventors: Stanley Lustig, Nancy M. Mack, Jeffrey M. Schuetz, Stephen J. Vicik
  • Patent number: 5434010
    Abstract: Biaxially stretched, heat shrinkable monolayer and multilayer films comprising very low density polyethylene terpolymers of monomers (a), (b) and (c), where (a) comprises ethylene, (b) comprises a C.sub.6 -C.sub.8 alpha-olefin and (c) comprises 1-butene or 1-hexene, have a very good combination of physical properties and processability including high shrinkage values and puncture resistance.
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: July 18, 1995
    Assignee: Viskase Corporation
    Inventors: Edwin R. Smith, Jeffrey M. Schuetz, Stanley Lustig
  • Patent number: 5358765
    Abstract: A tubular cellulosic casing comprising cellulose or a cellulose derivative which has incorporated therewith a polyethylene oxide composition having a molecular weight of at least 70,000 and a method of manufacturing the same.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: October 25, 1994
    Assignee: Viskase Corporation
    Inventor: John Markulin
  • Patent number: 5344679
    Abstract: Orientable single and multilayer thermoplastic flexible films utilizing blends comprising an amorphous nylon copolymer such as nylon 6I/6T and a nylon copolyamide having a melting point of at least about 145.degree. C. having improved processability, shrinkage and optical properties.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: September 6, 1994
    Assignee: Viskase Corporation
    Inventor: Stephen J. Vicik
  • Patent number: 5304385
    Abstract: A shirred tubular thermoplastic casing article of an ethylene polymer film with a substantially mineral oil-free liquid lubricating coating on the outside surface of the casing, and in contact with the ethylene polymer film, with preferred coatings being polyhydric alcohols such as 1, 2 propylene glycol or glycerine in water, or an aqueous dispersion of lecithin, and a method of manufacturing the article and method for making a processed foodstuff using the article.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: April 19, 1994
    Assignee: Viskase Corporation
    Inventors: Darrel L. Wilhoit, Jeffery A. Oxley
  • Patent number: 5256458
    Abstract: A shirred tubular thermoplastic casing article of an ethylene polymer film with a substantially mineral oil-free liquid lubricating coating on the outside surface of the casing, and in contact with the ethylene polymer film, with preferred coatings being polyhydric alcohols such as 1, 2 propylene glycol or glycerine in water, or an aqueous dispersion of lecithin, and a method of manufacturing the article and method for making a processed foodstuff using the article.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: October 26, 1993
    Assignee: Viskase Corporation
    Inventors: Jeffery A. Oxley, Darrel L. Wilhoit
  • Patent number: 5230933
    Abstract: Acid resistant peeling aid compositions and casings, particularly tubular cellulosic food casings, coated therewith, which compositions contain a water-soluble cellulose ether, dextrin and optionally lecithin.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: July 27, 1993
    Assignee: Viskase Corporation
    Inventors: Patrick B. Apfeld, Frederick M. Merritt, II
  • Patent number: 5077109
    Abstract: An oriented multilayer film comprising a barrier layer, a first layer on one side of said barrier layer and a second layer on the opposite side of said barrier layer is provided for use in food packaging applications. The first and second layers have melting points of at least about 115.degree. C. The barrier layer comprises amorphous nylon having a glass transition temperature greater than the higher of the two melting points or higher than the melting point of the first and second layers. The barrier layer is substantially impermeable to oxygen, while the first and second layers may comprise certain polyethylene resins. The oxygen barrier properties of the film do not deteriorate as the barrier layer gradually absorbs moisture. A process for making such multilayer films is also provided.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: December 31, 1991
    Assignee: Viskase Corporation
    Inventors: Stanley Lustig, Stephen J. Vicik
  • Patent number: 5053259
    Abstract: Novel orientable single and multilayer thermoplastic flexible films utilizing blends comprising an amorphous nylon copolymer such as nylon 6I/6T and a nylon copolyamide having a melting point of at least about 145.degree. C. having improved processability, shrinkage and optical properties.
    Type: Grant
    Filed: August 23, 1988
    Date of Patent: October 1, 1991
    Assignee: Viskase Corporation
    Inventor: Stephen J. Vicik
  • Patent number: 5032463
    Abstract: Biaxially stretched monolayer and multilayer films comprising blends of a 1-butene very low density polyethylene with a 1-hexene very low density polyethylene have improved combinations of properties including good puncture resistance and shrinkage values and unexpectedly good machine direction shrink force.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: July 16, 1991
    Assignee: Viskase Corporation
    Inventor: Edwin R. Smith
  • Patent number: 5030464
    Abstract: Manufacture and use of a fiber-reinforced cellulosic casing article with 40%-65% moisture, a first ketene dimer peeling aid coating on the casing inner surface, a second wood-derived tar-containing liquid smoke coating and precipitated tar having a single mode mass spectrometric distribution below 400 atomic mass units.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: July 9, 1991
    Assignee: Viskase Corporation
    Inventors: James R. Hansen, Myron D. Nicholson, Jeffrey B. Sherry