Granted Patent
Utility
US 4,246,176 · App. 06/055,039
Synthesis of 5-aroyl-1-hydrocarbylpyrrole-2-acetic acid
Inventor:
Edward J. Zaiko
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Jul 5, 1979
Inventor
Edward J. Zaiko
Assignee (at issue)
Ethyl 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.