Patents by Inventor Frederick Quincy Johnson

Frederick Quincy Johnson 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).

  • Static equilibrium path for measurements of dynamic flows
    Patent number: 10670555
    Abstract: A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: June 2, 2020
    Assignee: SENTIENT TECHNOLOGIES, INC.
    Inventor: Frederick Quincy Johnson
  • STATIC EQUILIBRIUM PATH FOR MEASUREMENTS OF DYNAMIC FLOWS
    Publication number: 20190323988
    Abstract: A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.
    Type: Application
    Filed: June 28, 2019
    Publication date: October 24, 2019
    Inventor: Frederick Quincy Johnson
  • Static equilibrium path for measurements of dynamic flows
    Patent number: 10338025
    Abstract: A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: July 2, 2019
    Assignee: SENTIENT TECHNOLOGIES, INC
    Inventor: Frederick Quincy Johnson
  • STATIC EQUILIBRIUM PATH FOR MEASUREMENTS OF DYNAMIC FLOWS
    Publication number: 20180340908
    Abstract: A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.
    Type: Application
    Filed: August 2, 2018
    Publication date: November 29, 2018
    Inventor: Frederick Quincy Johnson
  • Static equilibrium path for measurements of dynamic flows
    Patent number: 10060896
    Abstract: A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: August 28, 2018
    Assignee: SENTIENT TECHNOLOGIES, INC.
    Inventor: Frederick Quincy Johnson
  • Self-calibrating ion meter
    Patent number: 9304103
    Abstract: An ion meter is calibrated by providing two ISFETS with different areas, where the two gate areas are used to calibrate the two ISFETS with respect to one another. The use of two ISFET gates that can be calibrated with respect to one another eliminates the need for an ion meter to be recalibrated before every use, and allows the ion meter to measure the concentration in the solution over an extended period of time.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: April 5, 2016
    Assignee: Sentient Technologies, Inc.
    Inventors: Mark Bain, Frederick Quincy Johnson
  • Self-Calibrating Ion Meter
    Publication number: 20130085701
    Abstract: An ion meter is calibrated by providing two ISFETS with different areas, where the two gate areas are used to calibrate the two ISFETS with respect to one another. The use of two ISFET gates that can be calibrated with respect to one another eliminates the need for an ion meter to be recalibrated before every use, and allows the ion meter to measure the concentration in the solution over an extended period of time.
    Type: Application
    Filed: September 27, 2012
    Publication date: April 4, 2013
    Inventors: Mark Bain, Frederick Quincy Johnson
  • Ion-Selective Ion Concentration Meter
    Publication number: 20130084214
    Abstract: An ion concentration meter measures a concentration of an ion in a solution by exposing both an ISFET gate and a reference electrode within a filtered test area. In preferred embodiments, the test area filters preferred compounds from a solution being tested by occluding an opening to the test area with a species-selective membrane. Contemplated species-selective membranes include silicate membranes, chalcogenide membranes, lanthanum fluoride membranes, and valinomycin membranes.
    Type: Application
    Filed: September 27, 2012
    Publication date: April 4, 2013
    Inventors: Frederick Quincy Johnson, Mark Bain, Henry Roskos
  • Static Equilibrium Path for Measurements of Dynamic Flows
    Publication number: 20130075254
    Abstract: A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.
    Type: Application
    Filed: September 24, 2012
    Publication date: March 28, 2013
    Inventor: Frederick Quincy Johnson