Patents by Inventor John Markulin

John Markulin 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).

  • Fibrous composite cellulosic film and method
    Patent number: 5747125
    Abstract: A crosslinked cellulose composite film including a regenerated cellulose matrix containing a uniform dispersion of hemp fibers and a poly(ethylene oxide) plasticizer. A method for forming the film includes mixing a slurry of the hemp, poly(ethylene oxide) and a cellulose solvent with a cellulose solution, extruding the mixture, regenerating the cellulose from the solution to form the matrix containing hemp fibers, contacting with a crosslinking agent and then drying.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: May 5, 1998
    Assignee: Viskase Corporation
    Inventor: John Markulin
  • Cellulosic composition and article
    Patent number: 5744251
    Abstract: The present invention relates to compounded fibrous dope compositions of amine oxide cellulose solutions having a uniformly dispersed second fibrous material, methods of producing the compositions, and shaped articles such as fibers, paper, films, and food casings produced from the compositions.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: April 28, 1998
    Assignee: Viskase Corporation
    Inventors: Paul Edmund DuCharme, Jr., Norman Abbye Protnoy, John Markulin, Myron Donald Nicholson
  • Reinforced cellulosic film
    Patent number: 5603884
    Abstract: Disclosed is a method of preparing an extruded cellulosic film which contains a uniform dispersion of hemp fibers by first adding the fibers to an amine oxide cellulose solvent to form a slurry, mixing the slurry with a molten aqueous solution of cellulose and amine oxide cellulose solvent extruding the mixture end then regenerating the dissolved cellulose.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: February 18, 1997
    Assignee: Viskase Corporation
    Inventors: Paul E. DuCharme, Jr., Norman A. Protnoy, John Markulin, Myron D. Nicholson
  • Method of manufacturing a cellulosic article containing an olefinic oxide polymer
    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
  • Cellulosic article containing an olefinic oxide polymer and method of manufacture
    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