Patents by Inventor Craig O. Hoffman

Craig O. Hoffman 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).

  • Patent number: 4890791
    Abstract: A device (10) for use in eliminating malodorous smells from a confined area. The device (10) includes a housing (12) defined by a side-wall (14) and walls (18, 22) closing opposite axial ends (16, 24) thereof. A reservoir (20) is defined within the housing (12) within an annular, interior wall (32). An annular space (38) is defined, thereby, between the interior wall (32) and the side-wall (14) of the housing (12). A porous insert (62) formed of fibrous material is received within the annular space (38). An annular ring of wicking material (64) encircles the insert (62), and a plurality of angularly-spaced, radially-extending spoke-like wicks (68) extend from the reservoir (20) to the ring wicking material (64). Liquid neutralizing agent (34) in the reservoir (20) is conducted from the reservoir (20), through the spoke-like wicks (68) to the ring wicking material (64), and, in turn, to the porous insert (62).
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: January 2, 1990
    Inventor: Craig O. Hoffman