Granted Patent
Utility
US 4,372,467 · App. 06/303,379
Dispensing valve to be used with bottles of fluent imaging material for the development of electrostatic images
Inventor:
Frederick J. Pritchitt
Patented Case
View Patent ↗
Granted: Feb 8, 1983
Filed: Sep 18, 1981
Inventor
Frederick J. Pritchitt
Assignee (at issue)
Marpac 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.