Granted Patent
Utility
US 5,262,089 · App. 07/805,664
Admixtures for inhibiting corrosion of steel in concrete
Inventors:
Gregory S. Bobrowski, Mark A. BURY, Stephen A. Farrington, Charles K. Nmai
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Dec 12, 1991
Inventors
Gregory S. Bobrowski
Mark A. BURY
Stephen A. Farrington
Charles K. Nmai
Assignee (at issue)
Sandoz 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.