Granted Patent
Utility
US 5,284,570 · App. 07/721,028
Fluid sample analyte collector and calibration assembly
Inventors:
Douglas R. Savage, Ronald E. Betts, Richard J. Koerner, Douglas R. Hillier
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Jun 26, 1991
Inventors
Douglas R. Savage
Ronald E. Betts
Richard J. Koerner
Douglas R. Hillier
Assignee (at issue)
PPG 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.