Granted Patent
Utility
US 5,911,331 · App. 09/031,593
Dome lid for drinking cup
Inventor:
Peter K. Boller
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: Feb 27, 1998
Inventor
Peter K. Boller
Assignee (at issue)
Lily Cups 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.