Granted Patent
Utility
US 5,138,481 · App. 07/734,385
Electrochromic device with color gradient and method of making the device
Inventor:
Hulya Demiryont
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Jul 23, 1991
Inventor
Hulya Demiryont
Assignee (at issue)
Ford Motor Company
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.