Granted Patent
Utility
US 5,159,045 · App. 07/700,803
Polyisocyanato-isocyanurate, and preparation process and use of the same
Inventors:
Ryuji Haseyama, Kouzou Hayashi, Kazuyuki Kuroda, Taisaku Kano, Takayoshi Sekido, Hiroshi Nomura, Kiyoshi Shikai
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: May 16, 1991
Inventors
Ryuji Haseyama
Kouzou Hayashi
Kazuyuki Kuroda
Taisaku Kano
Takayoshi Sekido
Hiroshi Nomura
Kiyoshi Shikai
Assignees (at issue)
Mitsui Toatsu Chemicals, Incorporated
Shimizu Seiko Kabushiki Gaisha
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.