Patents by Inventor John J. Santini

John J. Santini 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).

  • Pulse width modulated boost converter integrated with power factor correction circuit
    Patent number: 6055167
    Abstract: An integrated power factor converter utilizes a silicon controlled rectifier (SCR) bridge which limits the inrush current by controlling the conduction angle of the SCR's. The same SCR bridge shuts down the output in case of short circuit and recovers automatically at a predetermined duty cycle rate. In case the input voltage exceeds approximately 275 VAC, the SCR bridge regulates the output voltage to below 400 VDC. The input inrush current is reduced by phasing up the input voltage in a controlled manner. The use of SCR's in the input bridge produces no additional losses, since the rectifier function is required regardless of which topology is used. The integrated power factor converter interfaces universal voltage mains to DC/DC converters while reducing input harmonics.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: April 25, 2000
    Assignee: Custom Power Systems, Inc.
    Inventors: Andrei Shamkovich, Donald Mulvey, John J. Santini
  • Stabilized polyacrylamide emulsions and methods of making same
    Patent number: 5571862
    Abstract: Dispersions of polyacrylamide particles are formed and treated with a caustic material to hydrolyze the polymer to form anionic acrylamide polymers. A preferred technique for forming these products comprises the formation of a stabilized water-in-oil emulsion of aqueous acrylamide monomer, polymerizing the monomer, reacting the polymer emulsion thus formed with a hydrolysis agent and inverting the resultant hydrolyzed polymers into solution.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: November 5, 1996
    Assignee: Cytec Technology Corp.
    Inventors: John J. Santini, N. Alan Yankie
  • Stabilized polyacrylamide emulsions and methods of making same
    Patent number: 5548020
    Abstract: Dispersions of polyacrylamide particles are formed and treated with a caustic material to hydrolyze the polymer to form anionic acrylamide polymers. A preferred technique for forming these products comprises the formation of a stabilized water-in-oil emulsion of aqueous acrylamide monomer, polymerizing the monomer, reacting the polymer emulsion thus formed with a hydrolysis agent and inverting the resultant hydrolyzed polymers into solution.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: August 20, 1996
    Assignee: Cytec Technology Corp.
    Inventors: John J. Santini, N. Alan Yankie