Patents by Inventor James Constant

James Constant 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: 20240115144
    Abstract: A system for measuring at least one physiological parameter includes a wearable device configured to be secured to a subject's foot and a camera configured to captures images of the subject. An electronic device may be in communication with the system and can display information relating to physiological data and/or images collected by the system.
    Type: Application
    Filed: December 11, 2023
    Publication date: April 11, 2024
    Inventors: Stephen Scruggs, James Ford Schramm, Mitchell Lloyd Ambrosini, Chad A. DeJong, Ammar Al-Ali, Richard Priddell, Sujin Hwang, Prianjali Kapur, Manuela Bertagia, Lara Garreffa, Emma Constant, Fabiola D’Ettorre, Xavier Blanc Baudriller
  • Patent number: 11827954
    Abstract: Disclosed herein are methods for preparing a hydraulic pre-concentrate enriched in rare earth elements and critical minerals, the method comprising: (a) contacting a raw material with a first base in an amount sufficient to adjust the pH to a value from about 4.0 to about 6.0, thereby forming a mixture comprising a first aqueous phase and a first solid concentrate; (b) separating the first aqueous phase from the first solid concentrate; (c) contacting the first aqueous phase with a second base in an amount sufficient to adjust the pH to a value from about 7.0 to about 9.0, thereby forming a mixture comprising a second aqueous phase and the hydraulic pre-concentrate; (d) removing the second aqueous phase and collecting the hydraulic pre-concentrate; wherein the raw material comprises rare earth elements; and wherein the hydraulic pre-concentrate is enriched in rare earth elements.
    Type: Grant
    Filed: July 28, 2022
    Date of Patent: November 28, 2023
    Assignee: West Virginia University
    Inventors: Paul F. Ziemkiewicz, James Constant, David K. Hoffman, John D. Quaranta
  • Publication number: 20230039988
    Abstract: The present disclosure relates to processes for treating a coal associated material, e.g., acid mine drainage, while simultaneously recovering a high-grade rare earth preconcentrate suitable for extraction of commercially valuable rare earth oxides. Disclosed herein are methods for preparing a hydraulic pre-concentrate enriched in rare earth elements and critical minerals. Also disclosed herein are methods for preparing a pregnant leach solution from the disclosed hydraulic pre-concentrates. The present disclosure also relates to systems and plants for carrying out the disclosed processes. Also disclosed are compositions produced by the process disclosed herein in which the compositions comprise rare earth elements. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
    Type: Application
    Filed: July 28, 2022
    Publication date: February 9, 2023
    Inventors: Paul F. Ziemkiewicz, James Constant, David K. Hoffman, John D. Quaranta
  • Publication number: 20220340997
    Abstract: The present disclosure relates to processes for treating a coal associated material, e.g., acid mine drainage, while simultaneously recovering a high-grade rare earth preconcentrate suitable for extraction of commercially valuable rare earth oxides. Disclosed herein are methods for preparing a hydraulic pre-concentrate enriched in rare earth elements and critical minerals. Also disclosed herein are methods for preparing a pregnant leach solution from the disclosed hydraulic pre-concentrates. The present disclosure also relates to systems and plants for carrying out the disclosed processes. Also disclosed are compositions produced by the process disclosed herein in which the compositions comprise rare earth elements. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
    Type: Application
    Filed: March 28, 2022
    Publication date: October 27, 2022
    Inventors: Paul F. ZIEMKIEWICZ, James CONSTANT, David K. HOFFMAN, JR., John D. QUARANTA
  • Patent number: 4737930
    Abstract: A transmission line is used to implement a divider or multiplier. Transmission lines are used to implement coefficient multipliers in Fourier transformers and Convolvers.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: April 12, 1988
    Inventor: James Constant
  • Patent number: 4620290
    Abstract: A transmission line is used to implement a divider or multiplier. Transmission lines are used to implement coefficient multipliers in Fourier transformers and Convolvers.
    Type: Grant
    Filed: October 26, 1983
    Date of Patent: October 28, 1986
    Inventor: James Constant