Granted Patent
Utility
US 5,317,841 · App. 07/938,202
Method for removal of surface contaminants from metal substrates
Inventors:
Jack R. Cook, Loren L. Hatle
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: Aug 28, 1992
Inventors
Jack R. Cook
Loren L. Hatle
Assignee (at issue)
Whitemetal, 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.