Granted Patent
Utility
US 5,030,421 · App. 07/238,896
Integral centrifuge tube and specimen slide
Inventor:
Louis Muller
Patented Case
View Patent ↗
Granted: Jul 9, 1991
Filed: Aug 31, 1988
Inventor
Louis Muller
Assignee (at issue)
Davstar Industries, Inc.
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.