Granted Patent
Utility
US 4,552,944 · App. 06/652,480
Process for preparing thermally stable super-soft polyurethane elastomer
Inventors:
Masayuki Kamiyama, Takashi Saito, Kiyotsugu Asai
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Sep 20, 1984
Inventors
Masayuki Kamiyama
Takashi Saito
Kiyotsugu Asai
Assignee (at issue)
Mitsui-Nisso Corporation
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.