Granted Patent
Utility
US 4,349,478 · App. 06/310,576
Process for the carbazolation of anthrimides
Inventor:
Zdenek Seha
Patented Case
View Patent ↗
Granted: Sep 14, 1982
Filed: Oct 9, 1981
Inventor
Zdenek Seha
Assignee (at issue)
Ciba-Geigy
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.