Granted Patent
Utility
US 4,819,862 · App. 06/859,660
Disposable plate lid and food container including same
Inventor:
Raymond V. Maroszek
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: May 5, 1986
Inventor
Raymond V. Maroszek
Assignee (at issue)
James River-Norwalk
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.