Granted Patent
Utility
US 5,416,123 · App. 08/233,945
Polyurethane foam prepared from high concentration-low viscosity polymer-polyol
Inventors:
Ariko Nishikawa, Tamotsu Kunihiro, Tsukuru Izukawa, Kiyotsugu Asai
Patented Case
View Patent ↗
Granted: May 16, 1995
Filed: Apr 28, 1994
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.