Granted Patent
Utility
US 6,790,387 · App. 10/048,967
Process of producing diffraction gratings on the surface of articles
Inventors:
Melville D. Ball, Matthew J. Fairlie, Harry Sang
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: May 10, 2002
Inventors
Melville D. Ball
Matthew J. Fairlie
Harry Sang
Assignee (at issue)
Alcan International Limited
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.