Patents by Inventor William J. Pifer

William J. Pifer 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: 4213309
    Abstract: The invention pertains to a cooler particularly suitable for use with recreational vehicles, such as tent trailers, and consists of a receptacle formed of a homogeneous sheet of synthetic plastic material wherein a portion of the receptacle includes a first bottom portion located at a vertical orientation higher than the vertical orientation of a second bottom receptacle portion wherein the cooler bottom is defined at different elevations. A partition separates the cooler multi-levels and consists of a wire grill slidably received within grooves defined in the receptacle side walls. Block ice may be located within the upper cooler level and a refrigeration system evaporator may also be placed therein, and the cooler construction permits a relatively large size cooler capacity in a concise configuration particularly adaptable to the vehicle interior configuration.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: July 22, 1980
    Inventor: William J. Pifer