Granted Patent
Utility
US 5,136,086 · App. 07/819,657
Preparation process of aliphatic isocyanate
Inventors:
Teruyuki Nagata, Masaru Wada, Hideki Mizuta
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Jan 13, 1992
Inventors
Teruyuki Nagata
Masaru Wada
Hideki Mizuta
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.