Granted Patent
Utility
US 4,912,247 · App. 07/299,484
Enhancement of aromatic amine inhibition of acrylate monomer polymerization by addition of mannich products
Inventor:
Paul V. Roling
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Jan 19, 1989
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.