Granted Patent
Utility
US 4,720,384 · App. 06/898,653
Manufacture of hollow fine tubular drug delivery systems
Inventors:
Robert C. Di Luccio, Ray B. Duggins, Eli Shefter
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Aug 21, 1986
Inventors
Robert C. Di Luccio
Ray B. Duggins
Eli Shefter
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.