Patents by Inventor William F. Moon

William F. Moon 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).

  • Air filtering face mask
    Patent number: 4549543
    Abstract: A respirator with an improved exhaust valve and a flexible face piece which conforms to the shape of the face of the wearer. The respirator is compact and principally formed of transparent material to minimize attention to the wearer.
    Type: Grant
    Filed: December 1, 1982
    Date of Patent: October 29, 1985
    Inventor: William F. Moon
  • Respirator filter and method of making the same
    Patent number: 4179274
    Abstract: A respirator filter is formed of felt impregnated with rosin, which is fractured throughout and is characterized by loosened fibers at one surface thereof. The method of forming the filter entails splitting a batt with fractured rosin impregnation to separate and displace the fibers at the plane of cleavage from their prior felted position.
    Type: Grant
    Filed: January 7, 1976
    Date of Patent: December 18, 1979
    Inventor: William F. Moon