Granted Patent
Utility
US 5,545,782 · App. 08/443,051
Method for inhibiting premature polymerization of vinyl aromatic monomers
Inventors:
Roland A. E. Winter, Volker H. von Ahn
Patented Case
View Patent ↗
Granted: Aug 13, 1996
Filed: May 17, 1995
Inventors
Roland A. E. Winter
Volker H. von Ahn
Assignee (at issue)
Ciba-Geigy
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.