Granted Patent
Utility
US 4,896,928 · App. 07/238,095
Chromatically invariant multilayer dielectric thin film coating
Inventors:
Bruce E. Perilloux, Stephen D. Vincent
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Aug 29, 1988
Inventors
Bruce E. Perilloux
Stephen D. Vincent
Assignee (at issue)
Coherent, 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.