Patents by Inventor Jack Edgar Johnson

Jack Edgar Johnson 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 fiber-based filters
    Patent number: 7582213
    Abstract: The present invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. The present invention also comprises a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g H2O/g dry HRC.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: September 1, 2009
    Assignees: Regents of the University of Minnesota, Agricultural Utilization Research Institute
    Inventors: Brock Lundberg, Lin Gu, Rongsheng Roger Ruan, Ling Chen, Paul Bradley Addis, Jack Edgar Johnson
  • Cellulose fiber-based compositions and their method of manufacture
    Patent number: 7074300
    Abstract: The present invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. The present invention also comprises a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g H2O/g dry HRC.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: July 11, 2006
    Assignees: Regents of the University of Minnesota, Agricultural Utilization Research Institute
    Inventors: Brock Lundberg, Lin Gu, Rongsheng Roger Ruan, Ling Chen, Paul Bradley Addis, Jack Edgar Johnson
  • Cellulose fiber-based compositions and their method of manufacture
    Publication number: 20030116289
    Abstract: The present invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. The present invention also comprises a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g H2O/g dry HRC.
    Type: Application
    Filed: November 25, 2002
    Publication date: June 26, 2003
    Applicant: Regents of the University of Minnesota
    Inventors: Brock Lundberg, Lin Gu, Rongsheng Roger Ruan, Ling Chen, Paul Bradley Addis, Jack Edgar Johnson
  • Cellulose fiber-based compositions and their method of manufacture
    Patent number: 6506435
    Abstract: An improved method for refining cellulose that produces a highly refined cellulosic material comprising soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. Also, a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g H2O/g dry HRC is provided.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: January 14, 2003
    Assignees: Regents of the University of Minnesota, Agricultural Utilization Research Institute
    Inventors: Brock Lundberg, Lin Gu, Rongsheng Roger Ruan, Ling Chen, Paul Bradley Addis, Jack Edgar Johnson
  • Cellulose fiber based compositions and film and the process for their manufacture
    Patent number: 5817381
    Abstract: A process and materials are described in which highly refined celleuloise fibers are broken down into microfibers and further processed into compositions, films. coatings and solid materials which are biodegradable and even edible. The process for the formation of hardenable compositions may comprise:providing a composition comprising non-wood cellulose fiber, 36. mechanically reducing the size of the non-wood cellulose fiber to less than 2 mm, reducing the amount of binding of microfibers by lignin within said non-wood cellulose fibers present in said composition comprising cellulose fiber to form a first fiber product, providing pressure of at least 300 psi to said first fiber product while it is in the presence of a liquid, and removing said pressure within a time interval which will cause said cellulose fiber to break down into a second fiber product comprising microfibers in said liquid.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: October 6, 1998
    Assignees: Agricultural Utilization Research Institute, Regents of the University of Minnesota
    Inventors: Ling Chen, Rongsheng Roger Ruan, Jack Edgar Johnson, Paul Bradley Addis, Li Xu, Lun Yi