Granted Patent
Utility
US 4,740,342 · App. 06/897,168
Thermoforming flexible plastic foam shells
Inventors:
Michael Menard, Philip J. Marbach
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Aug 15, 1986
Inventors
Michael Menard
Philip J. Marbach
Assignee (at issue)
Personal Products 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.