Granted Patent
Utility
US 4,997,901 · App. 07/168,236
Reaction curable composition comprising a polyisocyanate component and a polyol component
Inventors:
Ryoji Yamada, Hiroyuki Watanabe, Kazuhiko Kuga
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Mar 15, 1988
Inventors
Ryoji Yamada
Hiroyuki Watanabe
Kazuhiko Kuga
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.