Granted Patent
Utility
US 5,324,774 · App. 07/960,681
Polymer-polyol, process for preparation thereof and uses thereof
Inventors:
Ariko Nishikawa, Tamotsu Kunihiro, Tsukuru Izukawa, Kiyotsugu Asai
Patented Case
View Patent ↗
Granted: Jun 28, 1994
Filed: Oct 14, 1992
Inventors
Ariko Nishikawa
Tamotsu Kunihiro
Tsukuru Izukawa
Kiyotsugu Asai
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.