Patents by Inventor Zvi Rogovin

Zvi Rogovin 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).

  • Process for preparing a dispersion of hard particles in solvent
    Patent number: 6051630
    Abstract: A process and a high pressure apparatus are disclosed which are useful in preparing magnetic dispersions and other dispersions of hard, non-compliant particulates. The apparatus can be monitored for clogs and wear and allows for relatively quick and inexpensive replacement of orifices. The apparatus includes a high pressure pump and a series of impingement chambers comprising an input manifold where the process stream is split into two or more streams and an output manifold where the streams are recombined after passing through restrictive orifices configured in such a manner that the streams impinge on each other at high velocities. The orifices in each succeeding impingement zone are the same size or smaller than the orifices in the preceding impingement zone, and the orifices in the final impingement zone must be smaller than the orifices in the first impingement zone.
    Type: Grant
    Filed: October 12, 1998
    Date of Patent: April 18, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Mark Serafin, Richard D. Olmsted, Richard M. Fuller, Bhaskar V. Velamakanni, Zvi Rogovin
  • Process for preparing a dispersion of hard particles in solvent
    Patent number: 5852076
    Abstract: A process and a high pressure apparatus are disclosed which are useful in preparing magnetic dispersions and other dispersions of hard, non-compliant particulates. The apparatus can be monitored for clogs and wear and allows for relatively quick and inexpensive replacement of orifices. The apparatus includes a high pressure pump and a series of impingement chambers comprising an input manifold where the process stream is split into two or more streams and an output manifold where the streams are recombined after passing through restrictive orifices configured in such a manner that the streams impinge on each other at high velocities. The orifices in each succeeding impingement zone are the same size or smaller than the orifices in the preceding impingement zone, and the orifices in the final impingement zone must be smaller than the orifices in the first impingement zone.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: December 22, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Mark Serafin, Richard D. Olmsted, Richard M. Fuller, Bhaskar V. Velamakanni, Zvi Rogovin