Granted Patent
Utility
US 5,242,968 · App. 07/572,831
Acrylic-filled thermoformable acrylic sheet
Inventors:
Ettore Minghetti, John E. Eitel
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Aug 27, 1990
Inventors
Ettore Minghetti
John E. Eitel
Assignee (at issue)
Aristech Chemical 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.