Patents Represented by Attorney Lee C. Robinson

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  • Gas generating device
    Patent number: 4849174
    Abstract: A device adapted to generate a gas flow containing a precise amount of impurities. The device comprises a membrane through which an impurity gas peremeates and mixing means to make a mixture of said impurity gas and a vector gas sweeping said membrane. The pressure of said mixture is substantially constant, but adjustable, to enhance the accuracy of the device.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: July 18, 1989
    Assignee: American Air Liquide
    Inventors: Michael D. Brandt, Francois Mermoud