Granted Patent
Utility
US 4,824,621 · App. 07/166,680
Method for making an ink-impregnated material
Inventors:
Arthur L. Piepmeier, Jr., Charles M. Nunally
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Mar 11, 1988
Inventors
Arthur L. Piepmeier, Jr.
Charles M. Nunally
Assignee (at issue)
Ormecon GmbH
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.