Granted Patent
Utility
US 4,835,389 · App. 07/158,214
Internal reflection spectroscopy for deep container immersion
Inventor:
Walter M. Doyle
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Feb 19, 1988
Inventor
Walter M. Doyle
Assignee (at issue)
Laser Precision Corp.
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.