Granted Patent
Utility
US 5,397,810 · App. 08/022,752
Polyol, polyurethane resin and utilization thereof
Inventors:
Satoshi Ozaki, Tsukuru Izukawa, Haruhiko Kawakami, Takayoshi Masuda, Masayuki Kimura, Toshio Nozawa, Masahiko Hashiba
Patented Case
View Patent ↗
Granted: Mar 14, 1995
Filed: Feb 19, 1993
Inventors
Satoshi Ozaki
Tsukuru Izukawa
Haruhiko Kawakami
Takayoshi Masuda
Masayuki Kimura
Toshio Nozawa
Masahiko Hashiba
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.