Patents by Inventor Robert J. Fehrenbach

Robert J. Fehrenbach 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).

  • Method of determining density
    Patent number: 4389136
    Abstract: An in situ non destructive method employing a radiation device to rapidly determine the density of very thin top layers of material independently of the underlying base material comprising of the steps of: measuring the density D.sub.b of the base layer with an radiation measuring device, determining the thickness t of the top layer, measuring the density D.sub.g of the composite with the radiation measuring device, and determining the density of the top layer from the expression: ##EQU1##where k is a constant.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: June 21, 1983
    Assignee: Seaman Nuclear Corporation
    Inventor: Robert J. Fehrenbach