Granted Patent
Utility
US 4,496,438 · App. 06/508,292
Bath composition and method for copper-tin-zinc alloy electroplating
Inventors:
Raymond L. Helton, Douglas W. Trobough, Marianne McPherson
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Jun 24, 1983
Inventors
Raymond L. Helton
Douglas W. Trobough
Marianne McPherson
Assignee (at issue)
Tektronix, 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.