Granted Patent
Utility
US 5,454,885 · App. 08/170,708
Method of purifying substrate from unwanted heavy metals
Inventors:
Gregory Dudoff, Karl A. Harris, Lee M. Mohnkern, Richard Williams, Robert Yanka, Thomas H. Meyers, III
Patented Case
View Patent ↗
Granted: Oct 3, 1995
Filed: Dec 21, 1993
Inventors
Gregory Dudoff
Karl A. Harris
Lee M. Mohnkern
Richard Williams
Robert Yanka
Thomas H. Meyers, III
Assignee (at issue)
LOCKHEED MARTIN CORPORATION
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.