Granted Patent
Utility
US 5,198,475 · App. 07/606,617
Polyol and utilization thereof
Inventors:
Masayuki Kimura, Satoshi Ozaki, Tsukuru Izukawa, Haruhiko Kawakami, Takayoshi Masuda, Mitsugu Kita
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Oct 31, 1990
Inventors
Masayuki Kimura
Satoshi Ozaki
Tsukuru Izukawa
Haruhiko Kawakami
Takayoshi Masuda
Mitsugu Kita
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.