Patents by Inventor Paul Z. Cao

Paul Z. Cao 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 and means for the preparation of solutions from dry chemicals
    Patent number: 8459284
    Abstract: An apparatus for preparing a chemical solution includes a lower housing and an upper housing. The lower housing has a base, an upper plate having a central opening, and a side wall. A grid mounted on the upper plate covers the opening. A wall within the lower housing divides the interior of the lower housing into a central inner chamber and an annular outer chamber; this wall extends into an upper portion of the lower housing. One portion of the wall has a reduced height to permit fluid flow from the inner chamber to the outer chamber. A nozzle is mounted in the inner chamber for discharging fluid into the inner chamber, and causes local elevation of a portion of the fluid surface above the grid. The nozzle may be an eductor creating a venturi effect to draw fluid into the eductor.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: June 11, 2013
    Assignee: Arch Chemicals, Inc.
    Inventors: James P. Brennan, Zachary H. Adams, Paul Z. Cao
  • METHOD AND MEANS FOR THE PREPARATION OF SOLUTIONS FROM DRY CHEMICALS
    Publication number: 20120067968
    Abstract: An apparatus for preparing a chemical solution includes a lower housing and an upper housing. The lower housing has a base, an upper plate having a central opening, and a side wall. A grid mounted on the upper plate covers the opening. A wall within the lower housing divides the interior of the lower housing into a central inner chamber and an annular outer chamber; this wall extends into an upper portion of the lower housing. One portion of the wall has a reduced height to permit fluid flow from the inner chamber to the outer chamber. A nozzle is mounted in the inner chamber for discharging fluid into the inner chamber, and causes local elevation of a portion of the fluid surface above the grid. The nozzle may be an eductor creating a venturi effect to draw fluid into the eductor.
    Type: Application
    Filed: September 17, 2010
    Publication date: March 22, 2012
    Inventors: James P. Brennan, Zachary H. Adams, Paul Z. Cao