Granted Patent
Utility
US 5,603,413 · App. 08/299,550
Sortation method for transparent optically active articles
Inventor:
Samuel T. Mitchum, Jr.
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Sep 1, 1994
Inventor
Samuel T. Mitchum, Jr.
Assignee (at issue)
Wellman Inc.
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.