Granted Patent
Utility
US 4,515,971 · App. 06/281,027
5'/6'-Carboxyfluorans and derivatives thereof
Inventors:
Paul Schmidt, William M. Hung
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Jul 6, 1981
Inventors
Paul Schmidt
William M. Hung
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.