Granted Patent
Utility
US 6,664,550 · App. 10/137,983
Apparatus to collect, classify, concentrate, and characterize gas-borne particles
Inventors:
Daniel J. Rader, John R. Torczynski, Karl Wally, John E. Brockmann
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Apr 30, 2002
Inventors
Daniel J. Rader
John R. Torczynski
Karl Wally
John E. Brockmann
Assignee (at issue)
Sandia National Laboratory
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.