Granted Patent
Utility
US 4,883,881 · App. 07/186,825
Preparation of UV grade synthetic pyridine
Inventors:
David Feitler, Henry Wetstein
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Apr 27, 1988
Inventors
David Feitler
Henry Wetstein
Assignee (at issue)
Nepera, 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.