Granted Patent
Utility
US 5,834,072 · App. 08/825,634
Powder coatings whose perceived color depends on the viewing angle
Inventors:
Axel Schonfeld, Erwin Dietz
Patented Case
View Patent ↗
Granted: Nov 10, 1998
Filed: Apr 1, 1997
Inventors
Axel Schonfeld
Erwin Dietz
Assignee (at issue)
Clariant 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.