Granted Patent
Utility
US 6,475,608 · App. 09/192,740
Multi-layer iridescent films
Inventors:
Scott I. Allen, Ramakrishna Shetty
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Nov 16, 1998
Inventors
Scott I. Allen
Ramakrishna Shetty
Assignee (at issue)
Engelhard 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.