Granted Patent
Utility
US 5,843,545 · App. 08/798,076
Polyester composition for use in thermoforming dual-ovenable trays
Inventor:
Jack E. Prince
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Feb 12, 1997
Inventor
Jack E. Prince
Assignee (at issue)
SHELL OIL 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.