Granted Patent
Utility
US 4,457,951 · App. 06/546,713
Etch solution and method
Inventors:
John F. D'Amico, Michael A. DeAngelo, Jr.
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Oct 28, 1983
Inventors
John F. D'Amico
Michael A. DeAngelo, Jr.
Assignee (at issue)
AT&T Technologies Incorporated
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.