Granted Patent
Utility
US 4,911,107 · App. 07/363,753
Standby cooling system for a fluidized bed boiler
Inventors:
Larry G. Crispin, Paul S. Weitzel
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Jun 9, 1989
Inventors
Larry G. Crispin
Paul S. Weitzel
Assignee (at issue)
The Babcock & Wilcox Company
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.