Granted Patent
Utility
US 5,594,088 · App. 08/478,653
Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur containing urethane resin lens and lens prepared thereby
Inventors:
Teruyuki Nagata, Koju Okazaki, Tohru Miura, Nobuyuki Kajimoto, Yoshinobu Kanemura, Katsuyoshi Sasagawa, Masao Imai
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Jun 7, 1995
Inventors
Teruyuki Nagata
Koju Okazaki
Tohru Miura
Nobuyuki Kajimoto
Yoshinobu Kanemura
Katsuyoshi Sasagawa
Masao Imai
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.