Granted Patent
Utility
US 5,578,658 · App. 08/352,811
High-speed polymerizable resin composition and lenses obtained therefrom
Inventors:
Katsuyoshi Sasagawa, Kenichi Fujii, Noboru Kawasaki, Toshiyuki Suzuki
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: Dec 1, 1994
Inventors
Katsuyoshi Sasagawa
Kenichi Fujii
Noboru Kawasaki
Toshiyuki Suzuki
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.