Granted Patent
Utility
US 4,968,889 · App. 07/309,435
Pulser injection with subsequent removal for gamma-ray spectrometry
Inventors:
Jack K. Hartwell, Scott G. Goodwin, Larry O. Johnson, E. Wayne Killian
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Feb 1, 1989
Inventors
Jack K. Hartwell
Scott G. Goodwin
Larry O. Johnson
E. Wayne Killian
Assignee (at issue)
United States Department of Energy
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.