Patents by Inventor Doyle Wayne McGrath

Doyle Wayne McGrath 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).

  • Apparatus for air purification
    Patent number: 4043774
    Abstract: An air purification unit for use in a compressed air system, said unit including a chamber having a plurality of serially connected sections located therein, said sections comprising a heat transfer section, a filter and expansion section, a supply reservoir section and a drying section, each section having an inlet and an outlet, the outlet of said heat transfer section connected with the inlet of said filter and expansion section, the outlet of said filter and expansion section connected to the inlet of said supply reservoir section, and the outlet of said supply reservoir section connected with the inlet of said drying section.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: August 23, 1977
    Inventor: Doyle Wayne McGrath