Granted Patent
Utility
US 5,171,888 · App. 07/690,430
Methods and compositions for inhibiting (meth)acrylic acid polymerization
Inventor:
Paul V. Roling
Patented Case
View Patent ↗
Granted: Dec 15, 1992
Filed: Apr 23, 1991
Inventor
Paul V. Roling
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.