Granted Patent
Utility
US 4,246,175 · App. 06/043,140
Synthesis of 5-cyano-1-hydrocarbylpyrrole-2-acetic acid
Inventor:
Michael J. Dagani
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: May 29, 1979
Inventor
Michael J. Dagani
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.