Granted Patent
Utility
US 4,710,261 · App. 07/007,858
Apparatus and method for maintaining a uniform etching solution composition
Inventor:
Timothy A. Dennis
Patented Case
View Patent ↗
Granted: Dec 1, 1987
Filed: Jan 28, 1987
Inventor
Timothy A. Dennis
Assignee (at issue)
RCA 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.