Granted Patent
Utility
US 4,918,077 · App. 07/301,379
3-phenyl-5,6-dihydrobenz(c)acridine-7-carboxylic acids and related compounds as cancer chemotherapeutic agents
Inventor:
Carl Henry Behrens
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Jan 25, 1989
Inventor
Carl Henry Behrens
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.