Patents by Inventor Ramachandran Murugesan

Ramachandran Murugesan 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).

  • Resonant structure for spatial and spectral-spatial imaging of free radical spin probes using radiofrequency time domain electron paramagnetic resonance spectroscopy
    Patent number: 6573720
    Abstract: A radiofrequency (RF) coil design, suitable for detecting time domain electron paramagnetic resonance (EPR) responses from spin probes after pulsed excitation using radiofrequency irradiation (60-400 MHz), is configured in an array of numerous surface coils of appropriate diameters connected in a parallel or axial configuration with appropriate spacing between individual surface coils to form a volume type resonator.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: June 3, 2003
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Nallathamby Devasahayam, James B. Mitchell, Angelo Russo, John Cook, Mobae Afeworki, Rolf G. Tschudin, Sankaran Subramanian, Ramachandran Murugesan, Frank S. Harrington, Murali K. Cherukuri
  • In vivo imaging and oxymetry by pulsed radiofrequency paramagnetic resonance
    Patent number: 5865746
    Abstract: A system for performing pulsed RF FT EPR spectroscopy and imaging includes an ultra-fast excitation subsystem and an ultra-fast data acquisition subsystem. Additionally, method for measuring and imaging in vivo oxygen and free radicals or for performing RF FT EPR spectroscopy utilizes short RF excitations pulses and ultra-fast sampling, digitizing, and summing steps.
    Type: Grant
    Filed: July 29, 1997
    Date of Patent: February 2, 1999
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Ramachandran Murugesan, Murali K. Cherukuri, James B. Mitchell, Sankaran Subramanian, Rolf G. Tschudin
  • Gated RF preamplifier for use in pulsed radiofrequency electron paramagnetic resonance and MRI
    Patent number: 5828216
    Abstract: A gated RF preamplifier used in system for performing pulsed RF FT EPR spectroscopy and imaging or MRI. The RF preamplifier does not overload during a transmit cycle so that recovery is very fast to provide for ultra-fast data acquisition in an ultra-fast excitation subsystem. The preamplifier includes multiple low-gain amplification stages with high-speed RF gates inserted between stages that are switched off to prevent each stage from overloading during the transmit cycle.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: October 27, 1998
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Rolf Gottfried Tschudin, Ramachandran Murugesan, Murali K. Cherukuri, James B. Mitchell, Sankaran Subramanian
  • System and method for performing in vivo imaging and oxymetry and FT microscopy by pulsed radiofrequency electron paramagnetic resonance
    Patent number: 5678548
    Abstract: A system for performing pulsed RF FT EPR spectroscopy and imaging includes an ultra-fast excitation subsystem and an ultra-fast data acquisition subsystem. Additionally, method for measuring and imaging in vivo oxygen and free radicals or for performing RF FT EPR spectroscopy utilizes short RF excitations pulses and ultra-fast sampling, digitizing, and summing steps.
    Type: Grant
    Filed: July 20, 1995
    Date of Patent: October 21, 1997
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Ramachandran Murugesan, Murali K. Cherukuri, James B. Mitchell, Sankaran Subramanian, Rolf G. Tschudin