Patents by Inventor Joseph C. Liao
Joseph C. Liao 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).
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Publication number: 20240207188Abstract: A medical device for retrieval of kidney stone fragments from a urinary tract is provided. The medical device has a plurality of magnets arranged within a flexible sheath forming a flexible wire. The magnets are magnetically attached end-to-end and arranged with their magnetic polarities alternating in direction. The magnetization direction of each of the magnets is orthogonal to the length axis of the flexible wire. A removable inner stylet is situated within the flexible sheath allowing for modifiable flexibility of the wire. The medical device is dimensioned to be introduced into the urinary tract and standard endoscopic devices. The medical device is further dimensioned to allow for the wire with magnetically attached stone fragments to be retrieved from the urinary tract. The magnetic field along the length axis is sufficient to attract to the surface of the flexible wire superparamagnetic nanoparticles which have bound themselves to kidney stone fragments.Type: ApplicationFiled: December 27, 2023Publication date: June 27, 2024Applicants: The Board of Trustees of the Leland Stanford Junior University, U.S. Government as represented by the Department of Veterans AffairsInventors: Tianjia Jessie Ge, Simon Conti, Joseph C. Liao, Kunj Raju Sheth, Shan X. Wang
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Patent number: 11903666Abstract: A medical device for retrieval of kidney stone fragments from a urinary tract is provided. The medical device has a plurality of magnets arranged within a flexible sheath forming a flexible wire. The magnets are magnetically attached end-to-end and arranged with their magnetic polarities alternating in direction. The magnetization direction of each of the magnets is orthogonal to the length axis of the flexible wire. A removable inner stylet is situated within the flexible sheath allowing for modifiable flexibility of the wire. The medical device is dimensioned to be introduced into the urinary tract and standard endoscopic devices. The medical device is further dimensioned to allow for the wire with magnetically attached stone fragments to be retrieved from the urinary tract. The magnetic field along the length axis is sufficient to attract to the surface of the flexible wire superparamagnetic nanoparticles which have bound themselves to kidney stone fragments.Type: GrantFiled: November 11, 2021Date of Patent: February 20, 2024Assignees: The Board of Trustees of the Leland Stanford Junior University, U.S. Government as represented by the Department of Veterans AffairsInventors: Tianjia Jessie Ge, Simon Conti, Joseph C. Liao, Kunj Raju Sheth, Shan X. Wang
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Publication number: 20220160450Abstract: A medical device for retrieval of kidney stone fragments from a urinary tract is provided. The medical device has a plurality of magnets arranged within a flexible sheath forming a flexible wire. The magnets are magnetically attached end-to-end and arranged with their magnetic polarities alternating in direction. The magnetization direction of each of the magnets is orthogonal to the length axis of the flexible wire. A removable inner stylet is situated within the flexible sheath allowing for modifiable flexibility of the wire. The medical device is dimensioned to be introduced into the urinary tract and standard endoscopic devices. The medical device is further dimensioned to allow for the wire with magnetically attached stone fragments to be retrieved from the urinary tract. The magnetic field along the length axis is sufficient to attract to the surface of the flexible wire superparamagnetic nanoparticles which have bound themselves to kidney stone fragments.Type: ApplicationFiled: November 11, 2021Publication date: May 26, 2022Inventors: Tianjia Jessie Ge, Simon Conti, Joseph C. Liao, Kunj Raju Sheth, Shan X. Wang
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Publication number: 20220160208Abstract: Over 2 million cystoscopies are performed annually in the United States and Europe for detection and surveillance of bladder cancer. Adequate identification of suspicious lesions is critical to minimizing recurrence and progression rates, however standard cystoscopy misses up to 20% of bladder cancer. Access to adjunct imaging technology may be limited by cost and availability of experienced personnel. Machine learning holds the potential to enhance medical decision-making in cancer detection and imaging. Various embodiments described herein are directed to methods for identifying cancers, tumors, and/or other abnormalities present in a person's bladder. Additional embodiments are directed to machine learning systems to identify cancers, tumors, and/or other abnormalities present in a person's bladder, while additional embodiments will also identify benign or native structures or features in a person's bladder.Type: ApplicationFiled: April 3, 2020Publication date: May 26, 2022Applicants: The Board of Trustees of the Leland Stanford Junior University, U.S. Government Represented by the Department of Veterans AffairsInventors: Joseph C. Liao, Lei Xing, Eugene Shkolyar, Xiao Jia
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Publication number: 20180172689Abstract: Methods for diagnosis of bladder cancer are disclosed. In particular, the invention relates to the use of urinary biomarkers for aiding diagnosis, prognosis, and treatment of bladder cancer, and to a panel of biomarkers that can be used to distinguish high-grade bladder cancer from low-grade bladder cancer.Type: ApplicationFiled: December 18, 2017Publication date: June 21, 2018Inventors: Joseph C. Liao, Kathleen E. Mach, Lai Yi Sin
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Publication number: 20110027782Abstract: Described are probes and methods for detecting pathogens and antibiotic resistance of a specimen. The method comprises contacting the specimen with a growth medium; and lysing the specimen to release nucleic acid molecules from the specimen. The lysate of the specimen is contacted with a capture probe immobilized on a substrate, wherein the capture probe comprises an oligonucleotide that specifically hybridizes with a first target nucleic acid sequence region of ribosomal RNA. The lysate is in contact with a detector probe that comprises a detectably labeled oligonucleotide that specifically hybridizes with a second target nucleic acid sequence region of ribosomal RNA. The presence or absence of labeled oligonucleotide complexed with the substrate is determined. Detection of labeled oligonucleotide complexed with the substrate is indicative of the presence of pathogen. Performing the method in the presence and absence of an antibiotic permits detection of antibiotic resistance.Type: ApplicationFiled: May 26, 2010Publication date: February 3, 2011Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, U.S. GOVERNMENT REPRESENTED BY THE DEPARTMENT OF VETERANS AFFAIRSInventors: DAVID A. HAAKE, BERNARD M. CHURCHILL, JOSEPH C. LIAO, MARC A. SUCHARD, YANG LI, MITRA MASTALI
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Patent number: 7763426Abstract: Described are probes and methods for detecting pathogens and antibiotic resistance of a specimen. The method comprises contacting the specimen with a growth medium; and lysing the specimen to release nucleic acid molecules from the specimen. The lysate of the specimen is contacted with a capture probe immobilized on a substrate, wherein the capture probe comprises an oligonucleotide that specifically hybridizes with a first target nucleic acid sequence region of ribosomal RNA. The lysate is in contact with a detector probe that comprises a detectably labeled oligonucleotide that specifically hybridizes with a second target nucleic acid sequence region of ribosomal RNA. The presence or absence of labeled oligonucleotide complexed with the substrate is determined. Detection of labeled oligonucleotide complexed with the substrate is indicative of the presence of pathogen. Performing the method in the presence and absence of an antibiotic permits detection of antibiotic resistance.Type: GrantFiled: May 1, 2007Date of Patent: July 27, 2010Assignees: The Regents of the University of California, The United States of America as represented by the Department of Veterans AffairsInventors: David A. Haake, Bernard M. Churchill, Joseph C. Liao, Marc A. Suchard, Yang Li, Mitra Mastali
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Publication number: 20080199863Abstract: Described are probes and methods for detecting pathogens and antibiotic resistance of a specimen. The method comprises contacting the specimen with a growth medium; and lysing the specimen to release nucleic acid molecules from the specimen. The lysate of the specimen is contacted with a capture probe immobilized on a substrate, wherein the capture probe comprises an oligonucleotide that specifically hybridizes with a first target nucleic acid sequence region of ribosomal RNA. The lysate is in contact with a detector probe that comprises a detectably labeled oligonucleotide that specifically hybridizes with a second target nucleic acid sequence region of ribosomal RNA. The presence or absence of labeled oligonucleotide complexed with the substrate is determined. Detection of labeled oligonucleotide complexed with the substrate is indicative of the presence of pathogen. Performing the method in the presence and absence of an antibiotic permits detection of antibiotic resistance.Type: ApplicationFiled: May 1, 2007Publication date: August 21, 2008Applicants: The Regents of the University of California, U.S. Government represented by the Dept. of Veterans AffairsInventors: David A. Haake, Bernard M. Churchill, Joseph C. Liao, Marc A. Suchard, Yang Li, Mitra Mastali