Granted Patent
Utility
US 5,885,478 · App. 08/959,700
Concrete mix water
Inventors:
Daniel P. Montgomery, Freda M. Bauer
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Oct 29, 1997
Inventors
Daniel P. Montgomery
Freda M. Bauer
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.