Granted Patent
Utility
US 4,428,511 · App. 06/296,850
Fluid handling apparatus having a fluid metering volume therein
Inventor:
Gary W. Howell
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Aug 27, 1981
Inventor
Gary W. Howell
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.