Granted Patent
Utility
US 4,369,112 · App. 06/244,849
Filter device
Inventors:
Monty E. Vincent, Robert E. Corbett
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Mar 18, 1981
Inventors
Monty E. Vincent
Robert E. Corbett
Assignee (at issue)
Gelman Sciences
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.