Granted Patent
Utility
US 6,177,499 · App. 09/266,185
Acrylic sheet having uniform distribution of color and mineral filler before and after thermoforming
Inventor:
Ettore Minghetti
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Mar 10, 1999
Inventor
Ettore Minghetti
Assignee (at issue)
Aristech Acrylics LLC
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.