Granted Patent
Utility
US 4,946,504 · App. 07/235,042
Cement building material
Inventor:
Simon K. Hodson
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Aug 19, 1988
Inventor
Simon K. Hodson
Assignee (at issue)
Concrete Technology, 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.