Patents by Inventor Robert P. Barss

Robert P. Barss 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).

  • Solvent-resistant microporous polybenzimidazole membranes and modules
    Patent number: 6986844
    Abstract: Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: January 17, 2006
    Assignee: Bend Research, Inc.
    Inventors: Robert P. Barss, Dwayne T. Friesen, Scott B. McCray, Kendall R. Pearson, Roderick J. Ray, Delores R. Sidwell, James B. West
  • Solvent-resistant microporous polybenzimidazole membranes and modules
    Publication number: 20040084365
    Abstract: Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.
    Type: Application
    Filed: June 27, 2003
    Publication date: May 6, 2004
    Inventors: Robert P. Barss, Dwayne T. Friesen, Scott B. McCray, Kendall R. Pearson, Roderick J. Ray, Delores R. Sidwell, James B. West
  • Solvent-resistant microporous polybenzimidazole membranes
    Patent number: 6623639
    Abstract: Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: September 23, 2003
    Assignee: Bend Research, Inc.
    Inventors: Robert P. Barss, Dwayne T. Friesen, Scott B. McCray, Kendall R. Pearson, Roderick J. Ray, Delores R. Sidwell, James B. West
  • Solvent-resistant microporous polybenzimidazole membranes
    Publication number: 20030159980
    Abstract: Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.
    Type: Application
    Filed: March 15, 2000
    Publication date: August 28, 2003
    Inventors: Robert P. Barss, Dwayne T. Friesen, Scott B. McCray, Kendall R. Pearson, Roderick J. Ray, Delores R. Sidwell, James B. West
  • Chlorine-resistant composite membranes with high organic rejection
    Patent number: 5582725
    Abstract: A method for making a chlorine-resistant composite polyamide membrane having high organic rejection, the essential step of which comprises treating a conventional composite membrane with an acyl halide. The novel membrane is especially suitable for the treatment of water containing chlorine or lower molecular weight organic compounds.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: December 10, 1996
    Assignee: Bend Research, Inc.
    Inventors: Scott B. McCray, Dwayne T. Friesen, Robert P. Barss, Leslie D. Nelson
  • Composite membrane for reverse osmosis
    Patent number: 4772391
    Abstract: A composite lumen-side feed reverse osmosis membrane and its preparation are disclosed, the membrane comprising a polymeric microporous-walled hollow fiber support with an interfacially-polymerized ultrathin semipermeable salt-rejecting layer engrafted on the lumen or bore of the hollow fiber support, the support having walls that are substantially completely free of finger-like voids in excess of about 5 microns in the area of the wall adjacent the lumen. The preparation of the support comprises coaxially spin-casting (1) a fiber-forming solution containing a pore-forming material with (2) a lumen-forming fluid comprising from about 50 to about 70 vol % organic solvent in water.
    Type: Grant
    Filed: June 24, 1986
    Date of Patent: September 20, 1988
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Richard W. Baker, Robert P. Barss