Granted Patent
Utility
US 4,579,260 · App. 06/579,403
Plastic blow-molded container having dispensing valve
Inventors:
William C. Young, Richard C. Darr, Craig A. Larson
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: Feb 13, 1984
Inventors
William C. Young
Richard C. Darr
Craig A. Larson
Assignee (at issue)
Plastipak Packaging, 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.