Patents by Inventor John Walter Rex

John Walter Rex 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 and apparatus for temperature controlled samplers
    Patent number: 4119403
    Abstract: The invention pertains to "wet chemistry" analytical devices for pollutant gases in air. Numerous improvements are provided including a thermo-electric heating/cooling device which uses the atmosphere as a heat sump. Critical flow means to maintain constant pressure throughout the system is also provided.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: October 10, 1978
    Assignee: W. R. Grace & Co.
    Inventor: John Walter Rex