Granted Patent
Utility
US 4,784,069 · App. 06/923,513
Chemical process fired heaters, furnaces or boilers
Inventor:
David Stark
Patented Case
View Patent ↗
Granted: Nov 15, 1988
Filed: Oct 27, 1986
Inventor
David Stark
Assignee (at issue)
Foster Wheeler USA 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.