Patents by Inventor William J. Zathan

William J. Zathan 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).

  • Patent number: 4276454
    Abstract: The invention is a bi-level fluid level sensor intended to be used in the bilges of boats with complementary equipment which activates emergency equipment such as warning devices and/or pumps when the upper level is reached, and deactivates such equipment when the lower level is reached. The sensor is uniquely constructed of three specially coatedwater repellent probe elements which are received in a socket which is in turn imbedded in a molded body of plastic or the like to absolutely seal the sensing unit against corrosion and mitigate against the accidental bridging of the probes by oil slicks and bilge slime.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: June 30, 1981
    Inventor: William J. Zathan