Patents by Inventor Li Fu Chen

Li Fu Chen 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).

  • Media manipulation for preparing biologically active hollow mycelial pellets
    Patent number: 4332903
    Abstract: Biologically active hollow fungal mycelial pellets are prepared by media manipulation. Initially fungal spores are innoculated under conditions limiting growth to formation of tiny cell aggregates of less than about 2 mm. Thereafter, the aggregates are subjected to conditions supportive of vigorous vegetative growth and agitation to produce hollow pellets having a porous spherical webbed mycelial layer and hollow core.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: June 1, 1982
    Assignee: Purdue Research Foundation
    Inventors: Cheng-Shung Gong, Li-Fu Chen, George T. Tsao
  • Porous cellulose beads
    Patent number: 4090022
    Abstract: Porous cellulose beads are prepared by distributing droplets of a solvent mixture containing a cellulose derivative into a precipitating solution to form porous beads which are then washed and hydrolyzed to form porous cellulose beads. The porous cellulose beads, which may be cross-linked, if desired, by suitable treatment, are useful carriers to which enzymes can be immobilized. The beads may also be used for the separation of enzymes, proteins, nucleic acids and the like, or to remove metal ions from dilute mining solutions.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: May 16, 1978
    Assignee: Purdue Research Foundation
    Inventors: George T. Tsao, Li Fu Chen
  • Porous cellulose beads and the immobilization of enzymes therewith
    Patent number: 4063017
    Abstract: Porous cellulose beads are prepared by distributing droplets of a solvent mixture containing a cellulose derivative into an aqueous solution to form porous beads which are then washed and hydrolyzed to form porous cellulose beads. The porous cellulose beads, which may be cross-linked, if desired, by suitable treatment, are useful carriers to which enzymes can be immobilized.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: December 13, 1977
    Assignee: Purdue Research Foundation
    Inventors: George T. Tsao, Li Fu Chen