Granted Patent
Utility
US 5,587,012 · App. 08/493,411
Composition for and method of pumping concrete
Inventor:
Daniel P. Montgomery
Patented Case
View Patent ↗
Granted: Dec 24, 1996
Filed: Jun 22, 1995
Inventor
Daniel P. Montgomery
Assignee (at issue)
FRITZ INDUSTRIES, 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.