Granted Patent
Utility
US 6,491,000 · App. 09/979,615
Wall protection from downward flowing solids
Inventors:
David J. Walker, Donald L. Wietzke, Gary L. Anderson, Richard F. Romansky, Jr.
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Nov 6, 2001
Inventors
David J. Walker
Donald L. Wietzke
Gary L. Anderson
Richard F. Romansky, Jr.
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.