Granted Patent
Utility
US 5,426,257 · App. 08/269,308
Compositions and methods for inhibiting vinyl aromatic monomer polymerization
Inventor:
Graciela B. Arhancet
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Jun 3, 1994
Inventor
Graciela B. Arhancet
Assignee (at issue)
Betz Laboratories, 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.