Granted Patent
Utility
US 4,600,442 · App. 06/640,724
Process for the removal of impurities from optical component materials
Inventors:
Ricardo C. Pastor, Luisa E. Gorre
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Aug 14, 1984
Inventors
Ricardo C. Pastor
Luisa E. Gorre
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.