Granted Patent
Utility
US 5,543,227 · App. 08/247,427
Soluble salt-free contaminant-free pigmented mirror coatings
Inventors:
Zephuren J. Hughes, Ole G. Torgussen
Patented Case
View Patent ↗
Granted: Aug 6, 1996
Filed: May 23, 1994
Inventors
Zephuren J. Hughes
Ole G. Torgussen
Assignee (at issue)
Sureguard, 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.