Granted Patent
Utility
US 4,474,646 · App. 06/393,006
Process for vinyl aromatic monomer polymerization inhibition
Inventors:
John C. Grivas, Myong-Gi A. Park
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Jun 28, 1982
Inventors
John C. Grivas
Myong-Gi A. Park
Assignee (at issue)
The Sherwin-Williams Company
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.