Patents by Inventor Allen E. Greendale

Allen E. Greendale 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 direct radon measurement
    Patent number: 3968371
    Abstract: Radon is directly measured by a portable device which is attached to the l of a mine or other area from which the gas may be emanating. The radon is collected and directed to an instrument having a gas proportional counter. To prevent build up of radon daughters on the gas proportional counter, with consequent high alpha particle background, a moving film surrounds the counter and carries away the radon daughters.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: July 6, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Allen E. Greendale