Patents by Inventor Eric A. Lindgren

Eric A. Lindgren 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).

  • Device for measuring property changes via in-situ micro-viscometry
    Patent number: 12104998
    Abstract: The present invention relates to devices for measuring property changes via in-situ micro-viscometry and methods of using same. The aforementioned device is inexpensive and can be used to quickly and accurately measure numerous physical and chemical property changes, including but not limited to the rate of chemical cure, change in tack, and rate of mass loss, for example, rate of moisture, solvent and/or plasticizer change.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: October 1, 2024
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Jonathan E. Spowart, Colin Rowbottom, Carly S. Hauser, Eric A. Lindgren
  • DEVICE FOR MEASURING PROPERTY CHANGES VIA IN-SITU MICRO-VISCOMETRY
    Publication number: 20220214256
    Abstract: The present invention relates to devices for measuring property changes via in-situ micro-viscometry and methods of using same. The aforementioned device is inexpensive and can be used to quickly and accurately measure numerous physical and chemical property changes, including but not limited to the rate of chemical cure, change in tack, and rate of mass loss, for example, rate of moisture, solvent and/or plasticizer change.
    Type: Application
    Filed: March 23, 2022
    Publication date: July 7, 2022
    Inventors: Jonathan E. Spowart, Colin Rowbottom, Carly S. Hauser, Eric A. Lindgren
  • In-situ micro-viscometry for low-cost cure monitoring and control
    Patent number: 11313778
    Abstract: The present invention relates to devices for measuring property changes via in-situ micro-viscometry and methods of using same. The aforementioned device is inexpensive and can be used to quickly and accurately measure numerous physical and chemical property changes, including but not limited to the rate of chemical cure, change in tack, and rate of mass loss, for example, rate of moisture, solvent and/or plasticizer change.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: April 26, 2022
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Jonathan E. Spowart, Colin Rowbottom, Carly S. Hauser, Eric A. Lindgren
  • Method and system for obtaining near-surface characteristics of materials using ultrasonic Rayleigh waves
    Patent number: 5895791
    Abstract: In a method for obtaining near-surface characteristics of a material, a series of single frequency ultrasonic Rayleigh waves are generated, with a generating system, in the material. The Rayleigh waves are detected with a detection system remote from the generating system. Velocities of the detected Rayleigh waves are determined at the selected frequencies. A depth profile of one or more characteristics of the material is prepared based on the determined Rayleigh wave velocities.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: April 20, 1999
    Assignee: Industrial Quality, Inc.
    Inventors: Eric A. Lindgren, Moshe Rosen, Harold Berger
  • Method and system for obtaining near-surface characteristics of materials using ultrasonic Rayleigh waves
    Patent number: 5894092
    Abstract: In a method for obtaining near-surface characteristics of a material, a series of single frequency ultrasonic Rayleigh waves are generated, with a generating system, in the material. The Rayleigh waves are detected with a detection system remote from the generating system. Velocities of the detected Rayleigh waves are determined at the selected frequencies. A depth profile of one or more characteristics of the material is prepared based on the determined Rayleigh wave velocities.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: April 13, 1999
    Assignee: Industrial Quality, Inc.
    Inventors: Eric A. Lindgren, Moshe Rosen, Harold Berger
  • Method and system for obtaining near-surface characteristics of materials using ultrasonic Rayleigh waves
    Patent number: 5767408
    Abstract: In a method for obtaining near-surface characteristics of a material, a broadband ultrasonic Rayleigh wave including a plurality of components is generated, with a generating system, in the material. The Rayleigh wave is detected with a detection system remote from the generating station. The detected Rayleigh wave is filtered to obtain selected ones of the plurality of components of the detected Rayleigh wave at selected frequencies. Velocities of the selected components of the detected Rayleigh wave are determined at the selected frequencies. A system for obtaining near-surface characteristics of a material is also disclosed.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: June 16, 1998
    Assignee: Industrial Quality, Inc.
    Inventors: Eric A. Lindgren, Moshe Rosen, Harold Berger