Granted Patent
Utility
US 5,286,723 · App. 07/902,560
Spiro compound
Inventors:
Isao Hayakawa, Shohgo Atarashi, Masazumi Imamura, Youichi Kimura
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Jun 22, 1992
Inventors
Isao Hayakawa
Shohgo Atarashi
Masazumi Imamura
Youichi Kimura
Assignee (at issue)
Daiichi Seiyaku 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.