Granted Patent
Utility
US 5,415,931 · App. 08/098,564
Acrylic-filled thermoformable acrylic sheet
Inventors:
Ettore Minghetti, John E. Eitel
Patented Case
View Patent ↗
Granted: May 16, 1995
Filed: Jul 26, 1993
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.