Patents by Inventor Frederick P. Jackson

Frederick P. Jackson 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).

  • Pressure cooker relief valve and pressure cookers incorporating such assemblies
    Patent number: 4313371
    Abstract: A pressure cooker the casing thereof carrying a pressure relief valve assembly comprising a relief valve having a valve member and a valve seating one of which acts against the other under pressure of biasing means to close a valve port opening into the interior of the cooker and a timer which can be preset to act on an operating member after a predetermined time period, said timer having an actuating member which moves to engage and move said operating member in a substantially linear direction, and said operating member being mechanically connected to means for relieving the pressure of the biasing means.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: February 2, 1982
    Assignee: The Prestige Group Limited
    Inventors: Frederick P. Jackson, Brian Newell
  • Pressure cooker
    Patent number: D263782
    Type: Grant
    Filed: August 9, 1978
    Date of Patent: April 13, 1982
    Assignee: The Prestige Group Limited
    Inventors: Frederick P. Jackson, Brian Newell