Granted Patent
Utility
US 4,684,437 · App. 06/793,608
Selective metal etching in metal/polymer structures
Inventors:
John J. Donelon, Yaffa Tomkiewicz, Thomas A. Wassick, James T. Yeh
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Oct 31, 1985
Inventors
John J. Donelon
Yaffa Tomkiewicz
Thomas A. Wassick
James T. Yeh
Assignee (at issue)
International Business Machines Corporation
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.