Granted Patent
Utility
US 5,155,273 · App. 07/556,589
Production of acetaminophen
Inventors:
John R. Fritch, O. Stanley Fruchey, Theodore Horlenko, Daniel A. Aguilar, Charles B. Hilton, Phillip S. Snyder, William J. Seeliger
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Jul 20, 1990
Inventors
John R. Fritch
O. Stanley Fruchey
Theodore Horlenko
Daniel A. Aguilar
Charles B. Hilton
Phillip S. Snyder
William J. Seeliger
Assignee (at issue)
Hoechst Celanese Corporation
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.