Granted Patent
Utility
US 5,476,957 · App. 08/338,225
Salicylic acid derivatives
Inventors:
Yoshimitsu Tanabe, Yuki Kobayashi, Atsuo Otsuji, Masakatsu Nakatsuka, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Dec 19, 1995
Filed: Nov 9, 1994
Inventors
Yoshimitsu Tanabe
Yuki Kobayashi
Atsuo Otsuji
Masakatsu Nakatsuka
Akihiro Yamaguchi
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.