Granted Patent
Utility
US 6,567,204 · App. 09/946,063
Electrochromic solution containing hydrazone compound and device manufactured with same
Inventors:
Fu-Shing Wang, Kuang-Mei Hsu
Patented Case
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Granted: May 20, 2003
Filed: Sep 4, 2001
Inventors
Fu-Shing Wang
Kuang-Mei Hsu
Assignee (at issue)
Exon Science Incorporation
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.