Granted Patent
Utility
US 5,091,496 · App. 07/523,467
Polyisocyanatoalkylphenyl-isocyanurates, method for the preparation thereof and use thereof
Inventors:
Ryuji Haseyama, Kazuyuki Kuroda, Kouzou Hayashi, Katsuyoshi Sasagawa, Taisaku Kano, Kiyoshi Shikai
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: May 15, 1990
Inventors
Ryuji Haseyama
Kazuyuki Kuroda
Kouzou Hayashi
Katsuyoshi Sasagawa
Taisaku Kano
Kiyoshi Shikai
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.