Patents by Inventor Kariyawasam P. W. Pemawansa

Kariyawasam P. W. Pemawansa 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).

  • Blotting methods using polyaldehyde activated membranes
    Patent number: 5160626
    Abstract: This invention relates to methods for gel electrophoresis, for sample transfer, for identifying a macromolecule, for blotting including dot blotting, and for colony hybridization, involving polyaldehyde activated microporous membranes.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: November 3, 1992
    Assignee: Gelman Sciences Inc.
    Inventors: Kariyawasam P. W. Pemawansa, Mark D. Heisler, Menahem Kraus
  • Blotting methods using polyaldehyde activated membranes
    Patent number: 4992172
    Abstract: This invention relates to macromolecular transfers, gel electrophoresis, and blotting methods involving polyaldehyde activated microporous membranes.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: February 12, 1991
    Assignee: Gelman Sciences, Inc.
    Inventors: Kariyawasam P. W. Pemawansa, Mark D. Heisler, Menahem Kraus
  • Polyaldehyde activated membranes
    Patent number: 4824870
    Abstract: An activated microporous membrane is provided, having aldehyde functional groups on its inner and outer surfaces. The aldehyde functionally on all surfaces provides for effective covalent bonding to the membrane by amine containing materials. The activated membrane can be made of a polysulfone/polyacrolein mixture or a polysulfone microporous membrane treated with a polyacrolein solution.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: April 25, 1989
    Assignee: Gelman Sciences, Inc.
    Inventors: Kariyawasam P. W. Pemawansa, Mark Heisler, Menahem Kraus