Patents by Inventor R. Douglas Burchesky

R. Douglas Burchesky 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).

  • Method for modifying asymmetric membranes by endo-treating
    Patent number: 4784880
    Abstract: A method of upgrading the selectively of a dry asymmetric permselective membrane comprising a porous barrier layer adjacent to a porous main body, where the barrier layer has an external obverse surface. The method comprises maintaining the barrier layer surface in a drying atmosphere while applying a wetting liquid which is not a solvent for the bulk of the membrane to the obverse surface to wet interstices of the bulk of the membrane, and drying the membrane by continuing the exposure of the external surface of the barrier layer to the drying atmosphere as the wetting liquid moves from the obverse surface through the membrane main body and the barrier layer.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: November 15, 1988
    Assignee: Albany International Corp.
    Inventors: Myron J. Coplan, R. Douglas Burchesky, Salvatore Giglia
  • Method for modifying asymmetric membranes by endo-treating
    Patent number: RE34115
    Abstract: A method of upgrading the .[.selectively.]. .Iadd.selectivity .Iaddend.of a dry asymmetric permselective membrane comprising a porous barrier layer adjacent to a porous main body, where the barrier layer has an external .[.obverse.]. surface .Iadd.and the main body has an external obverse surface.Iaddend.. The method comprises maintaining the barrier layer surface in a drying atmosphere while applying a wetting liquid which is not a solvent for the bulk of the membrane to the obverse surface to wet interstices of the bulk of the membrane, and drying the membrane by continuing the exposure of the external surface of the barrier layer to the drying atmosphere as the wetting liquid moves from the obverse surface through the membrane main body and the barrier layer.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: October 27, 1992
    Assignee: Albany International Corp.
    Inventors: Myron J. Coplan, R. Douglas Burchesky, Salvatore Giglia