Granted Patent
Utility
US 4,931,097 · App. 07/012,582
Process for preparing activators for fast-setting cements
Inventor:
Elliot I. Band
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Feb 9, 1987
Inventor
Elliot I. Band
Assignee (at issue)
Rhone-Poulenc Basic Chemicals Co.
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.