Granted Patent
Utility
US 4,376,685 · App. 06/277,057
Acid copper electroplating baths containing brightening and leveling additives
Inventor:
Angus A. Watson
Patented Case
View Patent ↗
Granted: Mar 15, 1983
Filed: Jun 24, 1981
Inventor
Angus A. Watson
Assignee (at issue)
M&T Chemicals, 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.