Patents by Inventor Michael L. STEWART

Michael L. STEWART 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).

  • Calibration material delivery devices and methods
    Patent number: 11933789
    Abstract: A device includes: a first portion configured to be grasped by the hand of the user, and a second portion defining a reservoir containing a control material, wherein the control material contains a target analyte in a known or predetermined concentration. A method of verifying the accuracy of an analyte monitoring device includes receiving a fluid sample, identifying the fluid sample as a control solution, and analyzing the fluid sample.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: March 19, 2024
    Assignee: Intuity Medical, Inc.
    Inventors: Kelley J. Lipman, Michael F. Tomasco, Peter Uy-Vu Ly, Jennifer Y. Blomo, Paul D. Reynolds, John F. Larkin, Robin S. Gaffney, Kimberly J. Tansey, Christopher L. Stewart, Raul Escutia, Robert W. Bowers
  • CUTTING ELEMENTS HAVING NON-PLANAR SURFACES AND DOWNHOLE CUTTING TOOLS USING SUCH CUTTING ELEMENTS
    Publication number: 20220112773
    Abstract: A cutting element may include a substrate and an ultrahard layer. A top surface of the ultrahard layer includes a peripheral edge extending around the cutting element, a cutting crest extending across a major dimension of the cutting element from a cutting edge at a first portion of the peripheral edge to a modified region at a central axis of the ultrahard layer, and a lateral portion extending across a minor dimension of the cutting element from the peripheral edge to the modified region. The modified region along the major dimension includes a concave cross-sectional shape. The lateral portion along the minor dimension from the peripheral edge to the modified region includes one or more of a linear shape and a convex shape, and the modified region along the minor dimension includes a planar shape perpendicular to the central axis.
    Type: Application
    Filed: December 23, 2021
    Publication date: April 14, 2022
    Inventors: Chen Chen, Huimin Song, Liang Zhao, Youhe Zhang, Michael G. Azar, Xiaoge Gan, Madapusi K. Keshavan, Zhijun Lin, Bala Durairajan, Michael L. Stewart
  • Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements
    Patent number: 11215012
    Abstract: A cutting element may include a substrate, an upper surface of the substrate including a crest, the crest transitioning into a depressed region, and an ultrahard layer on the upper surface, thereby forming a non-planar interface between the ultrahard layer and the substrate. A top surface of the ultrahard layer includes a cutting crest extending along at least a portion of a diameter of the cutting element, the top surface having a portion extending laterally away from the cutting crest having a lesser height than a peak of the cutting crest.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: January 4, 2022
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Chen Chen, Huimin Song, Liang Zhao, Youhe Zhang, Michael G. Azar, Xiaoge Gan, Madapusi K. Keshavan, Zhijun Lin, Bala Durairajan, Michael L. Stewart
  • CUTTING ELEMENTS HAVING NON-PLANAR SURFACES AND DOWNHOLE CUTTING TOOLS USING SUCH CUTTING ELEMENTS
    Publication number: 20190264511
    Abstract: A cutting element may include a substrate, an upper surface of the substrate including a crest, the crest transitioning into a depressed region, and an ultrahard layer on the upper surface, thereby forming a non-planar interface between the ultrahard layer and the substrate. A top surface of the ultrahard layer includes a cutting crest extending along at least a portion of a diameter of the cutting element, the top surface having a portion extending laterally away from the cutting crest having a lesser height than a peak of the cutting crest.
    Type: Application
    Filed: May 13, 2019
    Publication date: August 29, 2019
    Inventors: Chen Chen, Huimin Song, Liang Zhao, Youhe Zhang, Michael G. Azar, Xiaoge Gan, Madapusi K. Keshavan, Zhijun Lin, Bala Durairajan, Michael L. Stewart
  • Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements
    Patent number: 10287825
    Abstract: A cutting element may include a substrate, an upper surface of the substrate including a crest, the crest transitioning into a depressed region, and an ultrahard layer on the upper surface, thereby forming a non-planar interface between the ultrahard layer and the substrate. A top surface of the ultrahard layer includes a cutting crest extending along at least a portion of a diameter of the cutting element, the top surface having a portion extending laterally away from the cutting crest having a lesser height than a peak of the cutting crest.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: May 14, 2019
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Chen Chen, Huimin Song, Liang Zhao, Youhe Zhang, Michael G. Azar, Xiaoge Gan, Madapusi K. Keshavan, Zhijun Lin, Bala Durairajan, Michael L. Stewart
  • CUTTING ELEMENTS HAVING NON-PLANAR SURFACES AND DOWNHOLE CUTTING TOOLS USING SUCH CUTTING ELEMENTS
    Publication number: 20150259988
    Abstract: A cutting element may include a substrate, an upper surface of the substrate including a crest, the crest transitioning into a depressed region, and an ultrahard layer on the upper surface, thereby forming a non-planar interface between the ultrahard layer and the substrate. A top surface of the ultrahard layer includes a cutting crest extending along at least a portion of a diameter of the cutting element, the top surface having a portion extending laterally away from the cutting crest having a lesser height than a peak of the cutting crest.
    Type: Application
    Filed: February 3, 2015
    Publication date: September 17, 2015
    Inventors: Chen CHEN, Huimin SONG, Liang ZHAO, Youhe ZHANG, Michael G. AZAR, Xiaoge GAN, Madapusi K. KESHAVAN, Zhijun LIN, Bala DURAIRAJAN, Michael L. STEWART