Patents by Inventor Norman Abbye Portnoy

Norman Abbye Portnoy 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).

  • Cellulose food casing, cellulose composition and production method therefor
    Patent number: 6547999
    Abstract: The present invention provides a method of preparing a cellulose solution suitable for extrusion as a seamless tubular film by providing a pulp of substantially open-ended fibrillated softwood fibers having a mean fiber length less than 2.0 mm and then dissolving the pulp in a suitable solvent to produce the cellulose solution. In addition, the present invention provides a method of preparing a cellulose food casing from a cellulose solution of the present invention.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: April 15, 2003
    Assignee: Viskase Corporation
    Inventors: Paul Edmund Ducharme, Jr., Myron Donald Nicholson, Norman Abbye Portnoy
  • Method and apparatus for forming a cellulose article including solvent recovery means
    Patent number: 6096258
    Abstract: A method and apparatus is disclosed for forming a cellulose film suitable for direct food contact by precipitation from a solution of cellulose water and a tertiary amine oxide cellulose solvent. After precipitation of a cellulose gel from the solution, the gel is washed at ever increasing temperatures and then dried to provide a cellulose film having a solvent level to not more than 40 ppm. Portions of the wash water is collected and treated to recover the solvent for reuse.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: August 1, 2000
    Assignee: Viskase Corporation
    Inventors: Paul Edmund DuCharme, Jr., Edward Makoto Kajiwara, Norman Abbye Portnoy
  • Cellulose article manufacturing method
    Patent number: 5658524
    Abstract: In a method for forming a cellulose tube suitable for use as a food casing or as cellophane film, in which a solution of nonderivatized cellulose, tertiary amine N-oxide and water is extruded through an air gap of at least five inches, and into a water bath, such that a wet cellulose tube is formed. The wet tube is inflated from about 55% to 140% or more and dried thereby substantially retaining its work-to-rupture characteristics, especially when compared to viscose-derived tubes.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: August 19, 1997
    Assignee: Viskase Corporation
    Inventors: Norman Abbye Portnoy, Edward Makoto Kajiwara, Paul Edmund Ducharme, Jr.
  • Cellulose food casing manufacturing method
    Patent number: 5658525
    Abstract: In a method for forming a cellulose tube suitable for use as a food casing, in which a solution of nonderivatized cellulose, tertiary amine N-oxide and water is extruded through a die gap and the extruded tube is downwardly drawn through an air gap while being internally cooled and then is passed into a water bath, the tube transverse direction tensile strength being increased by drawing the extruded tube through an air length of at least about five inches and exposing the exterior surface of the extruded tube to cooling air in the air gap.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: August 19, 1997
    Assignee: Viskase Corporation
    Inventors: Edward Makoto Kajiwara, Norman Abbye Portnoy, Paul Edmund Ducharme, Jr.