Granted Patent
Utility
US 6,743,963 · App. 09/464,253
Methods for the prevention of radon emissions
Inventors:
Louis F. Centofanti, Steve Boddeker, W. Emmett Bolch, George Harder
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Dec 16, 1999
Inventors
Louis F. Centofanti
Steve Boddeker
W. Emmett Bolch
George Harder
Assignee (at issue)
PERMA-FIX ENVIRONMENTAL SERVICES, INC.
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.