Granted Patent
Utility
US 5,531,363 · App. 08/258,659
Dispensing closure cartridge valve system
Inventors:
Richard A. Gross, Eldon W. Schaffer, II
Patented Case
View Patent ↗
Granted: Jul 2, 1996
Filed: Jun 10, 1994
Inventors
Richard A. Gross
Eldon W. Schaffer, II
Assignee (at issue)
AptarGroup, 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.