Granted Patent
Utility
US 4,020,133 · App. 05/710,939
Anti-lumping coating for polystyrene beads
Inventor:
Timothy Altares, Jr.
Patented Case
View Patent ↗
Granted: Apr 26, 1977
Filed: Aug 2, 1976
Inventor
Timothy Altares, Jr.
Assignee (at issue)
Arco Polymers, Inc.
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.