Granted Patent
Utility
US 6,720,404 · App. 10/116,843
Polycarbonates for optical use, and their applications
Inventors:
Kazushige Inoue, Tomoaki Shimoda
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Apr 5, 2002
Inventors
Kazushige Inoue
Tomoaki Shimoda
Assignee (at issue)
General Electric 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.