Granted Patent
Utility
US 5,239,409 · App. 07/709,360
Reflectance infrared microscope having high radiation throughput
Inventors:
Walter M. Doyle, Norman S. Hughes
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: Jun 3, 1991
Inventors
Walter M. Doyle
Norman S. Hughes
Assignee (at issue)
Research-Cottrell Technologies, 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.