Granted Patent
Utility
US 6,747,080 · App. 09/947,448
Polycarbonate resin composition for the production of a substrate for an optical information medium
Inventors:
Hiroshi Hachiya, Nobutsugu Namba
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Sep 7, 2001
Inventors
Hiroshi Hachiya
Nobutsugu Namba
Assignee (at issue)
ASAHI KASEI KABUSHIKI KAISHA
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.