Granted Patent
Utility
US 4,505,404 · App. 06/587,814
Container with integral closure
Inventors:
William C. Perchak, Douglas E. Foos
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Mar 9, 1984
Inventors
William C. Perchak
Douglas E. Foos
Assignee (at issue)
Plastofilm 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.