Granted Patent
Utility
US 4,579,616 · App. 06/551,224
Method of fabrication of an optically flat membrane
Inventors:
Henry Windischmann, W. Derek Buckley
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: Nov 14, 1983
Inventors
Henry Windischmann
W. Derek Buckley
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.