Patents by Inventor Maie St. John

Maie St. John 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).

  • Publication number: 20200323431
    Abstract: An imaging system and method is disclosed for intraoperative surgical margin assessment in between various tissues and cell groupings having differing physiologic processes. The system uses an array of LED's to pump a target anatomy with a short excitation pulse and measures the lifetime of fluorescence to generate contrast. A relative fluorescence lifetime map is generated corresponding to the measured lifetime to identify boundaries within varying cell groupings and tissues.
    Type: Application
    Filed: April 25, 2020
    Publication date: October 15, 2020
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Maie St. John, George Saddik, Zachary Taylor, Warren Grundfest
  • Publication number: 20200085407
    Abstract: Systems and methods for performing multi-frequency harmonic acoustography for target identification and border detection are described, where a focused confocal transducer having a piezoelectric element and a hydrophone positioned centrally in the piezoelectric element is used. The transducer emits ultrasonic waves toward a target of interest at first and second frequencies. The two waves interfere at a focal plane within the target to generate a third acoustic wave. The target absorbs energy and emits its own unique vibration at the difference frequency (?f) of the two waves as well as its harmonics. The unique vibration is recorded with a hydrophone, and mechanical properties of the target are ascertained through detection and analysis of the third acoustic wave using a mathematical model implemented by a signal processing circuit.
    Type: Application
    Filed: September 25, 2019
    Publication date: March 19, 2020
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Warren Grundfest, Maie St. John, Ashkan Maccabi, George Saddik, Zachary Taylor
  • Publication number: 20200033336
    Abstract: Devices and methods are provided for the detection of CSF in a biological sample. In certain embodiments the device is a lateral flow device comprising: a porous substrate; a sample addition zone disposed on or in said porous substrate; a detection zone disposed on or in said porous substrate where said detection zone comprises at least a first test line (T1) and a second test line (T2) each test line comprising binding moieties that bind a complex formed between beta-trace protein (betaTP) and an indicator attached to a betaTP binding molecule; wherein said porous substrate defines a flow path through which a sample applied to the sample addition zone flows under capillary action away from said sample addition zone into said detection zone.
    Type: Application
    Filed: March 26, 2018
    Publication date: January 30, 2020
    Inventors: Daniel T. Kamei, Maie A. ST John, Zachary D. Taylor, Daniel W. Bradbury, Ashley E. Kita
  • Publication number: 20190293789
    Abstract: A vibro-acoustography imaging system that that generates a map of the mechanical response of a target to an acoustic radiation force, usually in low kHz range by a confocal geometry. The system generates two focused sinusoidal beams to produce a stress field at the beat frequency, which is a function of vibration and acoustic emissions field in terms of mechanical properties. A highly sensitive hydrophone is then used for detection of the acoustic emissions field, the amplitude of which may be correlated to the mechanical properties of the target tissue.
    Type: Application
    Filed: April 3, 2019
    Publication date: September 26, 2019
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Warren S. Grundfest, Maie St. John, Ashkan Maccabi, George Saddik, Zachary D. Taylor
  • Patent number: 10041883
    Abstract: A time-resolved fluorescence imaging (TRFI) system that images a target medium without lifetime fitting. Instead of extracting the lifetime precisely, the system images the fluorophore distribution to allow for a simple and accurate method to obtain the fluorescence image without lifetime-extraction for time-resolved fluorescence imaging. An illumination source circuit for TRFI is also disclosed that shapes the excitation pulse. In one embodiment, the illumination source comprises an LED and stub line configured for generating a linear decay profile.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: August 7, 2018
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Warren S. Grundfest, Oscar M. Stafsudd, Pei-Chi Jiang, Asael Papour, Zachary Deis Taylor, Maie St. John