Granted Patent
Utility
US 4,659,405 · App. 06/847,529
Method and apparatus for making a sealing lip for lid on thermoformed container
Inventor:
John Walter
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Apr 3, 1986
Inventor
John Walter
Assignee (at issue)
Continental Can Company, 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.