Patents by Inventor Donald Joseph Stookey

Donald Joseph Stookey 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).

  • Process for the manufacture of a membrane device with internal sweep
    Patent number: 6180168
    Abstract: An internally swept membrane separation device is manufactured by applying a coating layer to an otherwise non-selective membrane in a controlled manner. A coating material is introduced into one end of a vertically positioned membrane separation device to flood the device to a controlled depth, thereby coating a predetermined portion of the non-selective membrane.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: January 30, 2001
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Donald Joseph Stookey, Paul William Kramer
  • Hollow fiber membrane device with inert filaments randomly distributed in the inter-fiber voids
    Patent number: 5779897
    Abstract: The present invention provides a fluid separation module and a process for utilizing the module containing a bundle of hollow fiber membranes and randomly dispersed within the bundle of fibers are filaments having an outer diameter from about 60 to about 3000 microns. The hollow fibers have an outer diameter from about 100 to about 1000 microns. The filaments are present in number from 0.5 to 5 filaments per fiber. Preferably, the filaments are placed among the fibers during manufacturing of the fibers and/or bundle. The presence of the filaments enhances the performance of the fluid separation module.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: July 14, 1998
    Assignee: Permea, Inc.
    Inventors: Dilip Gurudath Kalthod, Donald Joseph Stookey