Granted Patent
Utility
US 4,451,657 · App. 06/094,794
3,5- And 5,5-bis(3-indolyl)-2-(5H)furanones
Inventors:
Nathan N. Crounse, Paul Schmidt
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Nov 16, 1979
Inventors
Nathan N. Crounse
Paul Schmidt
Assignee (at issue)
Hilton Davis Chemical Co.
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.