Granted Patent
Utility
US 5,158,684 · App. 07/667,849
Transport and deposit inhibition of copper in boilers
Inventors:
Roger Moulton, Alexander C. McDonald, James L. Soos
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Mar 12, 1991
Inventors
Roger Moulton
Alexander C. McDonald
James L. Soos
Assignee (at issue)
Betz Laboratories, 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.