Granted Patent
Utility
US 5,166,285 · App. 07/835,307
Hard transparent resins and process for the production thereof
Inventors:
Katsuyoshi Sasagawa, Yoshinobu Kanemura, Masao Imai, Toshiyuki Suzuki
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Feb 14, 1992
Inventors
Katsuyoshi Sasagawa
Yoshinobu Kanemura
Masao Imai
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.