Granted Patent
Utility
US 4,937,339 · App. 07/295,201
Process for preparing isocyanurate ring-containing materials
Inventors:
Tetsunosuke Shiomura, Yoshiho Sonobe, Akihiro Yamaguchi, Ryuzi Haseyama
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Dec 16, 1988
Inventors
Tetsunosuke Shiomura
Yoshiho Sonobe
Akihiro Yamaguchi
Ryuzi Haseyama
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.