Granted Patent
Utility
US 5,254,760 · App. 07/921,824
Inhibiting polymerization of vinyl aromatic monomers
Inventors:
Roland A. E. Winter, Sheng-Shing Li, Leslie R. Gatechair, Volker H. von Ahn
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: Jul 29, 1992
Inventors
Roland A. E. Winter
Sheng-Shing Li
Leslie R. Gatechair
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.