Granted Patent
Utility
US 4,822,474 · App. 07/044,876
Residual analyzer assembly
Inventor:
Daniel R. Corrado
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Apr 30, 1987
Inventor
Daniel R. Corrado
Assignee (at issue)
Pennwalt Corporation
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.