Patents by Inventor Ivan Hrvoic

Ivan Hrvoic 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).

  • Nuclear magnetometers for earth's field measurements based on dynamic polarization of nuclei and free radical substance for use therein
    Patent number: 3966409
    Abstract: A free radical substance for use in a suitable solvent as the sample material in nuclear dynamic polarization type magnetometers which is a free radical substance of the oxazolidine group wherein the radicals R.sub.1 and R.sub.2 are chain radicals of the type --(CH.sub.2).sub.n CH.sub.3, wherein n varies from 0 to 2. It has been found that the free radical 2,2,4,4, tetramethyl oxazolidine-3-oxyl has outstanding characteristics for this purpose.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: June 29, 1976
    Inventors: Ivan Hrvoic, Kresimir Humski