Granted Patent
Utility
US 5,747,154 · App. 08/620,511
Acrylic sheet having uniform distribution of coloring and mineral filler before and after thermoforming
Inventors:
Ettore Minghetti, John E. Eitel, Carol A. Wetter
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Mar 22, 1996
Inventors
Ettore Minghetti
John E. Eitel
Carol A. Wetter
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.