Granted Patent
Utility
US 6,695,905 · App. 10/182,734
PIGMENTS HAVING A VIEWING ANGLE DEPENDENT SHIFT OF COLOR, METHOD FOR PRODUCING SAID PIGMENTS, USE OF SAID PIGMENTS IN SECURITY APPLICATIONS, COATING COMPOSITION COMPRISING SAID PIGMENTS AND A DETECTING DEVICE
Inventors:
Olivier Rozumek, Edgar Müller
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Aug 14, 2002
Inventors
Olivier Rozumek
Edgar Müller
Assignee (at issue)
SICPA HOLDING SA
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.