Granted Patent
Utility
US 5,283,365 · App. 07/896,696
Process for preparing high-purity aniline
Inventors:
Teruyuki Nagata, Katsuji Watanabe, Yoshitsugu Kono, Akihiro Tamaki, Takashi Kobayashi
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Jun 10, 1992
Inventors
Teruyuki Nagata
Katsuji Watanabe
Yoshitsugu Kono
Akihiro Tamaki
Takashi Kobayashi
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.