Granted Patent
Utility
US 4,495,345 · App. 06/474,464
Optical element and optical polycarbonate resin composition for the preparation thereof
Inventors:
Sota Kawakami, Hideki Murata, Satoshi Matsunaga, Toshihiko Kiriki
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Mar 11, 1983
Inventors
Sota Kawakami
Hideki Murata
Satoshi Matsunaga
Toshihiko Kiriki
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
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.