Granted Patent
Utility
US 5,719,672 · App. 08/721,148
Echelle spectrometer with a shaped oriented slit
Inventor:
Ring-Ling Chien
Patented Case
View Patent ↗
Granted: Feb 17, 1998
Filed: Sep 26, 1996
Inventor
Ring-Ling Chien
Assignee (at issue)
Varian, 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.