Patents by Inventor Darryl Keefer Brogan

Darryl Keefer Brogan 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).

  • Protective cover assembly for underfloor access housing
    Patent number: 4012874
    Abstract: A protective cover assembly for an outlet opening of an underfloor access housing is provided to prevent ingress through the outlet opening of a subsequently poured layer of floor fill, such as concrete. The assembly comprises a cup-shaped cap having a fence-like vertical extension detachably connected thereto. The assembly is enveloped by the floor fill and has an upper peripheral edge spaced below the upper surface of the floor fill by up to 1 inch (25.4 mm). A release coating interposed between the protective cover assembly and the floor fill facilitates breakout and removal of the overlying layer of floor fill.
    Type: Grant
    Filed: May 12, 1976
    Date of Patent: March 22, 1977
    Assignee: H. H. Robertson Company
    Inventors: Darryl Keefer Brogan, Paul Leon Haskins, Robert George Lindner