Patents Represented by Attorney Thomas J. Bird, Jr.

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  • Series feed membrane stack
    Patent number: 3979190
    Abstract: A plurality of selectively permeable membrane cells are mounted in parallel spaced-apart relationship to form a stack. Each cell includes a substrate and selectively permeable membranes positioned on the major surfaces thereof. The substrates are provided with flow ports at alternate end portions to provide a series flow path through the stack which is sealed by peripheral gasket members and end plates. The stack is adapted for use in pressure and vacuum gas enricher systems.
    Type: Grant
    Filed: June 4, 1974
    Date of Patent: September 7, 1976
    Assignee: General Electric Company
    Inventor: Jonathan W. Hedman
  • Process for producing nitrogen dioxide-free oxygen-enriched gas
    Patent number: 3930813
    Abstract: Membrane permeation processes to produce oxygen-enriched gas from atmospheric air are improved by initially contacting an ambient air feed with triethanolamine to substantially reduce the nitrogen dioxide content in the air and thereafter feeding the nitrogen dioxide depleted air to an array of membrane cells and finally withdrawing the oxygen-enriched permeate output therefrom, substantially free of nitrogen dioxide, for further use.
    Type: Grant
    Filed: November 27, 1974
    Date of Patent: January 6, 1976
    Assignee: General Electric Company
    Inventor: David M. Gessner
  • Process for producing oxygen-enriched gas
    Patent number: 3930814
    Abstract: Membrane permeation processes to produce oxygen-enriched gas from atmospheric air are improved by feeding the air to membrane cells divided into two groups, independently withdrawing the permeate output from the two groups of cells into two conduits containing restrictions, and referencing the pressure of one output against the other. A subsequent imbalance of pressure between the two permeate outputs indicates a membrane leakage in one of the two groups of cells.
    Type: Grant
    Filed: November 27, 1974
    Date of Patent: January 6, 1976
    Assignee: General Electric Company
    Inventor: David M. Gessner