Patents by Inventor Umberto Perrini

Umberto Perrini 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).

  • Apparatus for determining grain size
    Patent number: 4755052
    Abstract: An apparatus for determining grain size distribution patterns of particles for selected measuring ranges, wherein a specimen cell (15) is arranged in a convergent monochromatic light beam (4) and the produced diffraction patterns (5a, 6a, 7a) are received by a photo detector. By altering the spacing of the specimen cell (15) from the photo detector (44), the measuring range can be selected for differing grain sizes.
    Type: Grant
    Filed: June 5, 1986
    Date of Patent: July 5, 1988
    Assignee: Fritsch GmbH
    Inventors: Marzio Giglio, Umberto Perrini