Granted Patent
Utility
US 5,196,632 · App. 07/896,990
Treatment of heat exchangers to reduce corrosion and by-product reactions
Inventors:
Thomas L. Larsen, Max E. Underwood, Maarten P. Noordzij, Shiou-Shan Chen
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Jun 11, 1992
Inventors
Thomas L. Larsen
Max E. Underwood
Maarten P. Noordzij
Shiou-Shan Chen
Assignee (at issue)
Badger Limited
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.