Granted Patent
Utility
US 5,493,442 · App. 08/218,736
Method for realizing a filter edge, optical thin-film and optical device with such a film
Inventors:
Jurgen Buchholz, Peter Wierer
Patented Case
View Patent ↗
Granted: Feb 20, 1996
Filed: Mar 28, 1994
Inventors
Jurgen Buchholz
Peter Wierer
Assignee (at issue)
Balzers Aktiengesellschaft
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.