Granted Patent
Utility
US 6,517,631 · App. 10/034,361
Method of producing a coal combustion ash composition
Inventor:
Alan E. Bland
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Dec 28, 2001
Inventor
Alan E. Bland
Assignee (at issue)
The University of Wyoming Research 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.