Granted Patent
Utility
US 4,912,031 · App. 07/111,667
Method for detecting carcinomatous and precarcinomatous colo-rectal disease
Inventors:
Carolyn C. Compton, Paul J. Durda
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Oct 23, 1987
Inventors
Carolyn C. Compton
Paul J. Durda
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.