Patents by Inventor Charles J. Hale

Charles J. Hale 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).

  • pH Meter probe assembly
    Patent number: 4415858
    Abstract: An assembly for mounting a pH probe in a flowing solution, such as a sanitary sewer line, which prevents the sensitive glass portion of the probe from becoming coated with grease, oil, and other contaminants, whereby the probe gives reliable pH indication over an extended period of time. The pH probe assembly utilizes a special filter media and a timed back-rinse feature for flushing clear surface contaminants of the filter. The flushing liquid is of a known pH and is utilized to check performance of the probe.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: November 15, 1983
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Charles J. Hale