Granted Patent
Utility
US 5,880,182 · App. 08/801,309
Water-reducing admixtures for cementitious compositions
Inventors:
Yoshikazu Minomiya, Akira Ohta, Minoru Yaguchi
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Feb 18, 1997
Inventors
Yoshikazu Minomiya
Akira Ohta
Minoru Yaguchi
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.