Patents by Inventor Gene W. Lou

Gene W. Lou 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 strength and light tubesheets for hollow fiber membrane permeators
    Patent number: 5234590
    Abstract: A high strength and low weight hollow fiber membrane tubesheet can be achieved by incorporating with the potting material a loading of a nominally spherical filler. The microsphere filler is preferably nonsmooth, hollow and nonporous and may be treated with a surface modifier agent. Other advantages are also obtained including improved machineability with more open, nonsmeared and nondistorted hollow fibers.
    Type: Grant
    Filed: March 25, 1992
    Date of Patent: August 10, 1993
    Assignees: E. I. Du Pont de Nemours and Company, L'Air Liquide S.A.
    Inventors: Billy J. Etienne, Gene W. Lou, Kenneth R. Heath
  • Vapor-permeable liquid-impermeable fabric
    Patent number: 4684568
    Abstract: A process is provided for making a water-impermeable, vapor-permeable fabric. A lightweight continuous coating of polypropylene resin is applied to the surface of a fibrous sheet to make the sheet impermeable to water and vapor. Subsequent calendering provides vapor permeability to the sheet while maintaining liquid water impermeability. The resultant product is particularly suited for use as a roofing-tile underlayment or as an air-infiltration barrier.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: August 4, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gene W. Lou
  • Process for making a nonwoven fabric of needling, heating, burnishing and cooling
    Patent number: 4582750
    Abstract: A process is provided for making strong, permeable nonwoven fabrics having an abrasion-resistant burnished surface. The process involves providing a lightly consolidated or weakly bonded web of thermoplastic synthetic organic fibers, needle punching the web, heating a surface of the needled web, and burnishing the heated surface with a rotating, smooth-surfaced metal roll, which preferably simultaneously cools the web surface.
    Type: Grant
    Filed: April 16, 1985
    Date of Patent: April 15, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gene W. Lou, Leon H. Zimmerman, Jr.