Granted Patent
Utility
US 4,772,296 · App. 07/049,590
Method of purifying and depositing group IIIa and group Va compounds to produce epitaxial films
Inventor:
Thomas M. Potts
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: May 12, 1987
Inventor
Thomas M. Potts
Assignee (at issue)
Eagle-Picher Industries, 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.