Granted Patent
Utility
US 6,447,553 · App. 09/695,746
Vacuum-deposited colorants
Inventors:
Michael G. Mikhael, Angelo Yializis
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Oct 24, 2000
Inventors
Michael G. Mikhael
Angelo Yializis
Assignee (at issue)
Sigma Technologies International, Inc.
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.