Patents by Inventor Evan E. Groopman

Evan E. Groopman 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).

  • Resonance ionization filter for secondary ion and accelerator mass spectrometry
    Patent number: 11501960
    Abstract: A method of removing nuclear isobars from a mass spectrometric technique comprising directing ions, decelerating the ions, neutralizing a first portion of the ions, creating residual ions and a second portion of the ions, reionizing a selective portion of the ions, re-accelerating the selective reionized portion of ions, and directing the reionized portion of ions to a detector. An apparatus to remove nuclear isobars comprising a deceleration lens, an equipotential surface, an electron source to neutralize a portion of the ion beam, a deflector pair, a tunable resonance ionization laser for selective resonant reionization, and an acceleration lens.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: November 15, 2022
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Evan E. Groopman, David G. Willingham
  • Resonance Ionization Filter for Secondary Ion and Accelerator Mass Spectrometry
    Publication number: 20210366698
    Abstract: A method of removing nuclear isobars from a mass spectrometric technique comprising directing ions, decelerating the ions, neutralizing a first portion of the ions, creating residual ions and a second portion of the ions, reionizing a selective portion of the ions, re-accelerating the selective reionized portion of ions, and directing the reionized portion of ions to a detector. An apparatus to remove nuclear isobars comprising a deceleration lens, an equipotential surface, an electron source to neutralize a portion of the ion beam, a deflector pair, a tunable resonance ionization laser for selective resonant reionization, and an acceleration lens.
    Type: Application
    Filed: March 29, 2021
    Publication date: November 25, 2021
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Evan E. Groopman, David G. Willingham