Granted Patent
Utility
US 4,303,667 · App. 06/138,502
Phenylprrole derivatives
Inventors:
Akiyoshi Ueda, Shigeru Kojima, Yasushi Yasuda, Hiroaki Nishikawa, Akira Nakada
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Apr 9, 1980
Inventors
Akiyoshi Ueda
Shigeru Kojima
Yasushi Yasuda
Hiroaki Nishikawa
Akira Nakada
Assignee (at issue)
Nippon Soda Co., Ltd
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.