Granted Patent
Utility
US 4,942,673 · App. 07/233,391
Sintering prevention in stagnant zones of fluid bed boilers
Inventor:
Rick L. Dellinger
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Aug 18, 1988
Inventor
Rick L. Dellinger
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.