Granted Patent
Utility
US 6,166,167 · App. 09/124,185
Polycarbonate resin for substrate of optical recording medium
Inventors:
Masaaki Miyamoto, Motonori Ueda
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Jul 28, 1998
Inventors
Masaaki Miyamoto
Motonori Ueda
Assignee (at issue)
MITSUBISHI CHEMICAL CORPORATION
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.