Patents by Inventor Makram N. Bishai

Makram N. Bishai 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).

  • Sanitizer alert system
    Patent number: 4142539
    Abstract: Delivery of a chemical sanitizing agent to the rinse system of a warewasher is confirmed by first sensing the absence and subsequently the presence of the sanitizing agent near the outlet of the delivery conduit. Failure to meet these two conditions in this order and within a preset time triggers an alarm to indicate delivery failure.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: March 6, 1979
    Assignee: Hobart Corporation
    Inventors: Kelvin Shih, Makram N. Bishai