Granted Patent
Utility
US 5,091,153 · App. 07/595,976
Chemical analysis test device
Inventor:
Steve S. Bachand
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Oct 11, 1990
Inventor
Steve S. Bachand
Assignee (at issue)
Toxi-Lab Incorporated
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.