Granted Patent
Utility
US 4,601,802 · App. 06/636,198
Apparatus for internally electropolishing tubes
Inventors:
Thomas L. Grimes, Robert Roeland, Frederic H. Schadewald
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Jul 31, 1984
Inventors
Thomas L. Grimes
Robert Roeland
Frederic H. Schadewald
Assignee (at issue)
The Upjohn Co.
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.