Granted Patent
Utility
US 5,908,876 · App. 08/831,534
Optical resin composition comprising a thiourethane prepolymer and use thereof
Inventors:
Kenichi Fujii, Nobuya Kawauchi, Toshiyuki Suzuki, Seiichi Kobayashi, Masao Imai
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Apr 7, 1997
Inventors
Kenichi Fujii
Nobuya Kawauchi
Toshiyuki Suzuki
Seiichi Kobayashi
Masao Imai
Assignee (at issue)
MITSUI CHEMICALS, INC.
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.