Patents by Inventor Timothy R. Brennan

Timothy R. Brennan 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).

  • Cylindrical fibrous structures with graded pore size
    Patent number: 4726901
    Abstract: Cylindrical fibrous structures comprising a fibrous mass of nonwoven, synthetic, polymeric microfibers wherein the microfibers are substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement or intertwining, the fiber structure having a substantially constant voids volume over at least a substantial portion of the structure and, preferably, a graded fiber diameter structure, both as measured in the radial direction. The structures are particularly useful as depth filters.
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: February 23, 1988
    Assignee: Pall Corporation
    Inventors: David B. Pall, Colin F. Harwood, Arthur Bradley, Timothy R. Brennan
  • Method of making cylindrical fibrous filter structures
    Patent number: 4594202
    Abstract: Cylindrical fibrous structures comprising a fibrous mass of nonwoven, synthetic, polymeric microfibers wherein the microfibers are substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement of intertwining, the fiber structure having a substantially constant voids volume over at least a substantial portion of the structure and, preferably, a graded fiber diameter structure, both as measured in the radial direction. The structures are particularly useful as depth filters.
    Type: Grant
    Filed: January 6, 1984
    Date of Patent: June 10, 1986
    Assignee: Pall Corporation
    Inventors: David B. Pall, Colin F. Harwood, Arthur Bradley, Timothy R. Brennan