Granted Patent
Utility
US 4,565,879 · App. 06/137,250
Process for producing substituted pyrroles
Inventor:
James Kao
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Apr 4, 1980
Inventor
James Kao
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.