Granted Patent
Utility
US 6,514,350 · App. 09/952,489
Process for removing rust from metal surfaces
Inventors:
Bruce L. Libutti, Joseph Mihelic
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Sep 14, 2001
Inventors
Bruce L. Libutti
Joseph Mihelic
Assignee (at issue)
Ashland, 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.