Granted Patent
Utility
US 5,420,322 · App. 08/298,831
Preparation of alkali-metal hexamethydisilazanes
Inventors:
Kuen-Wai Chiu, David H. Ellenberger, Joseph M. Barendt
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Aug 31, 1994
Inventors
Kuen-Wai Chiu
David H. Ellenberger
Joseph M. Barendt
Assignee (at issue)
Mine Safety Appliances Company, LLC
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.