Granted Patent
Utility
US 5,509,849 · App. 08/229,468
Blast nozzle for water injection and method of using same for blast cleaning solid surfaces
Inventor:
William E. Spears, Jr.
Patented Case
View Patent ↗
Granted: Apr 23, 1996
Filed: Apr 18, 1994
Inventor
William E. Spears, Jr.
Assignee (at issue)
Church & Dwight Co., Inc.
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.