Granted Patent
Utility
US 4,846,931 · App. 07/174,852
Method for lifting-off epitaxial films
Inventors:
Thomas J. Gmitter, Eli Yablonovitch
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Mar 29, 1988
Inventors
Thomas J. Gmitter
Eli Yablonovitch
Assignee (at issue)
Bell Communications Research, 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.