Patents by Inventor Jerome Ditter

Jerome Ditter 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).

  • Hollow fibres
    Publication number: 20050242021
    Abstract: Elongate hollow fibre polymeric membranes having an outer surface, a plurality of pores and a pore size gradient increasing radially inwardly such that the pores form a substantially hollow passage in the fibre are disclosed. The hollow fiber membranes are made by mixing a liquid lumen forming agent with a polymer dope, and then contacting the dope with a quench fluid for a time sufficient for the dope to solidify, wherein the quench fluid is contacted only at an outer surface of the dope corresponding with an outer surface on the hollow fibre.
    Type: Application
    Filed: April 15, 2003
    Publication date: November 3, 2005
    Applicant: Pall Corporation
    Inventors: Jerome Ditter, Heinz-Joachim Muller, Daniel Mullette
  • Large pore synthetic polymer membranes
    Patent number: 6440306
    Abstract: Highly asymmetric polymeric membranes with large pores which yield bubble points in the range of 0.5 to 25 psid and superior flow characteristics. The membranes can be cast from both metastable dispersions and from homogenous casting formulations. The technique of synthesis involves exposure of the cast membrane to humid air to create large surface pores on the exposed side.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: August 27, 2002
    Assignee: Pall Corporation
    Inventors: Jerome Ditter, Richard A. Morris, Robert Zepf
  • Large pore synthetic polymer membranes
    Patent number: 6277281
    Abstract: Highly asymmetric polymeric membranes with large pores which yield bubble points in the range of 0.5 to 25 psid and superior flow characteristics. The membranes can be cast from both metastable dispersions and from homogenous casting formulations. The technique of synthesis involves exposure of the cast membrane to humid air to create large surface pores on the exposed side.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: August 21, 2001
    Assignee: USF Filtration and Separations Group Inc.
    Inventors: Jerome Ditter, Richard A. Morris, Robert Zepf
  • Large pore synthetic polymer membranes
    Patent number: 6110369
    Abstract: Highly asymmetric polymeric membranes with large pores which yield bubble points in the range of 0.5 to 25 psid and superior flow characteristics. The membranes can be cast from both metastable dispersions and from homogenous casting formulations. The technique of synthesis involves exposure of the cast membrane to humid air to create large surface pores on the exposed side.
    Type: Grant
    Filed: July 29, 1997
    Date of Patent: August 29, 2000
    Assignee: USF Filtration and Separations Group, Inc.
    Inventors: Jerome Ditter, Richard A. Morris, Robert Zepf
  • Large pore synthetic polymer membranes
    Patent number: 5979670
    Abstract: Highly asymmetric polymeric membranes with large pores which yield bubble points in the range of 0.5 to 25 psid and superior flow characteristics. The membranes can be cast from both metastable dispersions and from homogenous casting formulations. The technique of synthesis involves exposure of the cast membrane to humid air to create large surface pores on the exposed side.
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: November 9, 1999
    Assignee: USF Filtration and Separations Group Inc.
    Inventors: Jerome Ditter, Richard A. Morris, Robert Zepf
  • Large pore synthetic polymer membranes
    Patent number: 5846422
    Abstract: Highly asymmetric polymeric membranes with large pores which yield bubble points in the range of 0.5 to 25 psid and superior flow characteristics. The membranes can be cast from both metastable dispersions and from homogenous casting formulations. The technique of synthesis involves exposure of the cast membrane to humid air to create large surface pores on the exposed side.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: December 8, 1998
    Assignee: Memtec America Corporation
    Inventors: Jerome Ditter, Richard A. Morris, Robert Zepf