Granted Patent
Utility
US 6,565,647 · App. 10/171,462
Cementitious shotcrete composition
Inventors:
Wilfred J. Day, Richard G. Parker, Frank M. MacNeil
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Jun 13, 2002
Inventors
Wilfred J. Day
Richard G. Parker
Frank M. MacNeil
Assignee (at issue)
Shieldcrete Ltd.
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.