Granted Patent
Utility
US 5,336,749 · App. 08/018,717
Alicyclic diamines, alicyclic diisocyanates and polyisocyanato-isocyanurates and method for the preparation thereof
Inventors:
Ryuji Haseyama, Masatoshi Takagi, Kouzou Hayashi, Katsuyoshi Sasagawa, Kazuyuki Kuroda, Taisaku Kano, Kiyoshi Shikai
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Feb 17, 1993
Inventors
Ryuji Haseyama
Masatoshi Takagi
Kouzou Hayashi
Katsuyoshi Sasagawa
Kazuyuki Kuroda
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.