Patents by Inventor Robert Offer

Robert Offer 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).

  • Composite fluid filtering medium and method of making
    Patent number: 4099943
    Abstract: A layer of open cell polyurethane foam adhered to a layer of a non-woven fibrous material of fine porosity relative to the foam results in an efficient fluid (e.g., air) filtering medium having a high capacity for retaining particulate contaminants. The combined layers are useful as an air filter element.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: July 11, 1978
    Assignee: Tenneco Chemicals, Inc.
    Inventors: Kurt Fischman, Robert Offer, Bernard Rudner, David Shepard