Patents by Inventor Bernard S. Liang

Bernard S. Liang 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).

  • High flux hollow fiber membrane
    Patent number: 5232601
    Abstract: A morphologically heterogeneous, hydrophobic polysulfone hollow fiber membrane comprising a sponge-like dense inner surface permeable to molecules of less than or equal to 30,000 Daltons, said inner surface having a fraction surface porosity from about 70 to about 80%; and an outer surface having large pores ranging from about 6 to about 16 .mu.m in diameter and small pores less than 500.ANG. in diameter and a fractional surface porosity from about 20 to about 30%; a method for producing same and a hemodialysis treatment method and apparatus incorporating same.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: August 3, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Chaokang Chu, Bernard S. Liang, Ann L. Ly