Granted Patent
Utility
US 3,971,471 · App. 05/351,561
Close-nesting, light-weight, one-piece drinking cup and apparatus for the manufacture thereof
Inventor:
Rodney E. Ludder
Patented Case
View Patent ↗
Granted: Jul 27, 1976
Filed: Apr 16, 1973
Inventor
Rodney E. Ludder
Assignee (at issue)
Owens-Illinois 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.