Granted Patent
Utility
US 4,680,044 · App. 06/801,666
Method of modifying the refractive index of fluoride glass
Inventor:
Ricardo C. Pastor
Patented Case
View Patent ↗
Granted: Jul 14, 1987
Filed: Nov 25, 1985
Inventor
Ricardo C. Pastor
Assignee (at issue)
Hughes Aircraft 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.