Granted Patent
Utility
US 5,072,849 · App. 07/574,651
Container and substance testing method
Inventor:
Robert A. Blau
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Aug 29, 1990
Inventor
Robert A. Blau
Assignee (at issue)
R. Alan Blau & Associates, 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.