Patents by Inventor Donna A. Read

Donna A. Read 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).

  • Radioactive tracing with particles
    Patent number: 5243190
    Abstract: There is provided radioactive particles having a ceramic matrix and an element which can be bombarded with neutrons to produce a gamma ray-emitting isotope. The particles are manufactured by mixing the ceramic components and the element, forming particles, sintering the particles, and the particles are subsequently made radioactive by bombardment with neutrons. Particles injected into wells or flow apparatus are traced by adding the radioactive particles and detecting the radioactive particles with gamma ray-sensitive instruments. Particles containing different elements are detected by spectral analysis of gamma rays.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: September 7, 1993
    Assignee: Protechnics International, Inc.
    Inventors: Thomas R. Bandy, Donna A. Read, Edward S. Wallace
  • Raioactive tracing with particles
    Patent number: 5182051
    Abstract: There is provided radioactive particles having a ceramic matrix and an element which can be bombarded with neutrons to produce a gamma ray-emitting isotope. The particles are manufactured by mixing the ceramic components and the element, forming particles, sintering the particles, and the particles are subsequently made radioactive by bombardment with neutrons. Particles injected into wells or flow apparatus are traced by adding the radioactive particles and detecting the radioactive particles with gamma ray-sensitive instruments. Particles containing different elements are detected by spectral analysis of gamma rays.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: January 26, 1993
    Assignee: ProTechnics International, Inc.
    Inventors: Thomas R. Bandy, Donna A. Read, Edward S. Wallace