Granted Patent
Utility
US 4,598,837 · App. 06/783,732
End closure with tamper evident element
Inventors:
Walter J. Kreiseder, Allen J. Vogel
Patented Case
View Patent ↗
Granted: Jul 8, 1986
Filed: Oct 3, 1985
Inventors
Walter J. Kreiseder
Allen J. Vogel
Assignee (at issue)
Courtesy Mold & Tool Corporation
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.