Granted Patent
Utility
US 6,074,730 · App. 09/001,974
Broad-band antireflection coating having four sputtered layers
Inventors:
Ronald E. Laird, Charles K. Carniglia
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Dec 31, 1997
Inventors
Ronald E. Laird
Charles K. Carniglia
Assignee (at issue)
The BOC Group Limited
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.