Granted Patent
Utility
US 5,466,281 · App. 08/273,338
Water-based ink composition for ball-point pen
Inventors:
David E. Hanke, Bruce Gindelberger, Saul Heiman
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Jul 11, 1994
Inventors
David E. Hanke
Bruce Gindelberger
Saul Heiman
Assignee (at issue)
National Ink Incorporated
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.