Patents by Inventor Vladimir I. Firsov

Vladimir I. Firsov 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 continuous production of polymer beads of controlled size
    Patent number: 4579718
    Abstract: An apparatus for the continuous production of spherical polymer beads in a restricted size range. Monomer droplets are produced in said size range by subjecting a fine monomer dispersion containing a controlled amount of a surface protective agent to controlled coalescence during passage through a tube (11) under laminar flow conditions. The monomer droplets are delivered from the tube (11) to the top of a polymerizing column (12) of variable cross-section wherein they undergo suspension polymerization in a laminar liquid stream descending through the column. Further polymerization in a separate reactor (30a, 30b) provides the desired polymer beads.
    Type: Grant
    Filed: December 12, 1983
    Date of Patent: April 1, 1986
    Assignee: Rohm and Haas Company
    Inventors: Claude R. L. Vairetti, Michel R. L. Desnoyers, Jack Carbonel, Paul D. A. Grammont, Arkadyi B. Pachkov, Vladimir A. Grigoriev, Vladimir I. Firsov
  • Continuous production of polymer beads of controlled size
    Patent number: 4424318
    Abstract: A process and apparatus for the continuous production of spherical polymer beads in a restricted size range. Monomer droplets are produced in said size range by subjecting a fine monomer dispersion containing a controlled amount of a surface protective agent to controlled coalescence during passage through a tube (11) under laminar flow conditions. The monomer droplets are delivered from the tube (11) to the top of a polymerizing column (12) of variable cross-section wherein they undergo suspension polymerization in a laminar liquid stream descending through the column. Further polymerization in a separate reactor (30a, 30b) provides the desired polymer beads.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: January 3, 1984
    Inventors: Claude R. L. Vairetti, Michel R. L. Desnoyers, Jack Carbonel, Paul D. A. Grammont, Arkadyi B. Pachkov, Vladimir A. Grigoriev, Vladimir I. Firsov