Granted Patent
Utility
US 5,728,209 · App. 08/911,836
Unitized cement admixture
Inventors:
Jeffrey R. Bury, David F. Factor, Zvi Grauer
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Aug 15, 1997
Inventors
Jeffrey R. Bury
David F. Factor
Zvi Grauer
Assignee (at issue)
MBT Holding AG
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.