Granted Patent
Utility
US 4,361,251 · App. 06/264,411
Detachment resistant retained lever tab
Inventors:
Neal E. Langseder, Friedrich Stein
Patented Case
View Patent ↗
Granted: Nov 30, 1982
Filed: May 18, 1981
Inventors
Neal E. Langseder
Friedrich Stein
Assignee (at issue)
American Can Company
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.