Granted Patent
Utility
US 5,973,827 · App. 09/009,323
Refractive/diffractive infrared imager and optics
Inventor:
Robert B. Chipper
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Jan 20, 1998
Inventor
Robert B. Chipper
Assignee (at issue)
Raytheon Company
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.