Patents by Inventor Steven H. Graham

Steven H. Graham 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).

  • High pressure, low flow rate fluid flow control
    Patent number: 7237573
    Abstract: An adjustable high pressure, low flow metering valve provides a sleeve extending about a restrictor shaft, the sleeve having a narrow helical groove formed in the inside diameter. A restrictor shaft within the sleeve encloses the groove and forms a sealed helical flow channel. The length of the flow channel is varied by withdrawing the restrictor shaft in the sleeve, whereby only a selected axial extent of the groove is enclosed by the sleeve to form a confined flow path. The shaft is provided with a threaded engagement in the body of the metering valve, so that rotation of an adjustment knob provides extremely fine control of the length of the flow path, and thus highly accurate selection of the flow resistance.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: July 3, 2007
    Inventor: Steven H. Graham
  • High pressure, low flow rate fluid flow control
    Publication number: 20040182436
    Abstract: An adjustable high pressure, low flow metering valve provides a sleeve extending about a restrictor shaft, the sleeve having a narrow helical groove formed in the inside diameter. A restrictor shaft within the sleeve encloses the groove and forms a sealed helical flow channel. The length of the flow channel is varied by withdrawing the restrictor shaft in the sleeve, whereby only a selected axial extent of the groove is enclosed by the sleeve to form a confined flow path. The shaft is provided with a threaded engagement in the body of the metering valve, so that rotation of an adjustment knob provides extremely fine control of the length of the flow path, and thus highly accurate selection of the flow resistance.
    Type: Application
    Filed: March 18, 2003
    Publication date: September 23, 2004
    Inventor: Steven H. Graham
  • Global ischemia induced gene
    Patent number: 5968771
    Abstract: The nucleotide sequence is provided for a novel death regulatory gene. In particular the present invention relates to a DNA segment encoding a giig15b gene; polypeptides encoded by that DNA segment; recombinant DNA molecules containing the DNA segment; cells containing the recombinant DNA molecule; a method of producing a giig15b peptide; and antibodies specific to giig15b protein.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: October 19, 1999
    Assignee: University of Pittsburgh
    Inventors: Kun Lin Jin, Jun Chen, Steven H. Graham, Roger P. Simon