Granted Patent
Utility
US 4,437,606 · App. 06/362,213
Beverage package and production blank with improved locking features
Inventor:
Earl J. Graser
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Mar 26, 1982
Inventor
Earl J. Graser
Assignee (at issue)
Manville Service 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.