Granted Patent
Utility
US 5,637,285 · App. 08/593,779
Process for nitrogen trifluoride synthesis
Inventors:
Daniel G. Coronell, Thomas Hsiao-Ling Hsiung, Howard Paul Withers, Jr., Andrew J. Woytek
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Jan 30, 1996
Inventors
Daniel G. Coronell
Thomas Hsiao-Ling Hsiung
Howard Paul Withers, Jr.
Andrew J. Woytek
Assignee (at issue)
Air Products and Chemicals, 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.