Patents by Inventor Charles Carlyle Helms

Charles Carlyle Helms 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).

  • Ozone absorbance controller
    Patent number: 4049987
    Abstract: An ozone absorbance controller for use with an ultraviolet light source, which includes a vented, trapped gas filter disposed in the optical emission path of said ultraviolet light source to absorb high energy ultraviolet rays of wavelengths below about 200 nanometers, and thereby substantially preventing the formation of ozone in the optical emission path subsequent to the filter.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: September 20, 1977
    Assignee: The Perkin-Elmer Corporation
    Inventor: Charles Carlyle Helms