Patents by Inventor Bennie J. Walthall

Bennie J. Walthall 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).

  • Transplantable artificial tissue and process
    Patent number: 4997443
    Abstract: A transplantable artificial tissue matrix structure containing viable cells which is suitable for insertion into the body is made by polymerizing precursors in an aqueous solution to form a shape retaining solid matrix comprising viable cells, matrix polymer and reversible gel polymer. The solution contains a matrix polymer precursor, a reversible gel polymer precursor, and viable cells. The reversible gel polymer is dissolved and removed to yield an insoluble, porous matrix containing viable cells. The conditions and reagents are selected to maintain the viability of the cells. The invention is particularly suitable for artificial transplant matrix tissue containing pancreatic islet cells.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: March 5, 1991
    Assignee: Hana Biologics, Inc.
    Inventors: Bennie J. Walthall, Yvonne E. McHugh, Houston F. Voss
  • Transplantable artificial tissue
    Patent number: 4902295
    Abstract: A transplantable artificial tissue matrix structure containing viable cells which is suitable for insertion into the body is made by polymerizing precursors in an aqueous solution to form a shape retaining solid matrix comprising viable cells, matrix polymer and reversible gel polymer. The solution contains a matrix polymer precursor, a reversible gel polymer precursor, and viable cells. The reversible gel polymer is dissolved and removed to yield an insoluble, porous matrix containing viable cells. The conditions and reagents are selected to maintain the viability of the cells. The invention is particularly suitable for artificial transplant matrix tissue containing pancreatic islet cells.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: February 20, 1990
    Assignee: Hana Biologics, Inc.
    Inventors: Bennie J. Walthall, Yvonne E. McHugh, Houston F. Voss