Granted Patent
Utility
US 4,668,083 · App. 06/799,390
Contact lithographic fabrication of patterns on large optics
Inventors:
Prasad R. Akkapeddi, Robert E. Hufnagel
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Nov 18, 1985
Inventors
Prasad R. Akkapeddi
Robert E. Hufnagel
Assignee (at issue)
PerkinElmer, 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.