Granted Patent
Utility
US 4,188,916 · App. 05/905,598
Waste heat boiler for abstraction of heat energy from gaseous effluent containing corrosive chemical contaminants
Inventors:
Denis G. Csathy, Wendell L. Y. Hung
Patented Case
View Patent ↗
Granted: Feb 19, 1980
Filed: May 15, 1978
Inventors
Denis G. Csathy
Wendell L. Y. Hung
Assignee (at issue)
Deltak Corporation
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.