Granted Patent
Utility
US 6,226,887 · App. 09/465,650
Freeze drying methods employing vapor flow monitoring and/or vacuum pressure control
Inventors:
Kenneth J. Tenedini, Siegfried G. Bart, Jr.
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Dec 16, 1999
Inventors
Kenneth J. Tenedini
Siegfried G. Bart, Jr.
Assignee (at issue)
S. P. Industries, Inc., The Virtis Division
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.