Granted Patent
Utility
US 5,593,486 · App. 08/567,457
Photochromic hot melt ink compositions
Inventors:
John F. Oliver, Trevor I. Martin, Carol A. Jennings, Eric Gerard Johnson, Stephan V. Drappel
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Dec 5, 1995
Inventors
John F. Oliver
Trevor I. Martin
Carol A. Jennings
Eric Gerard Johnson
Stephan V. Drappel
Assignee (at issue)
Xerox Corporation
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.