Granted Patent
Utility
US 5,679,175 · App. 08/162,176
Cleaning process including use of solvating and rinsing agents
Inventors:
Michael E. Hayes, Donald P. Hosman, Kevin R. Hrebenar, Robert D. Sell
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: Dec 14, 1993
Inventors
Michael E. Hayes
Donald P. Hosman
Kevin R. Hrebenar
Robert D. Sell
Assignee (at issue)
Petroferm, 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.