Granted Patent
Utility
US 5,789,405 · App. 07/711,420
Oxaspiro(2,5)octane derivative
Inventors:
Teruo Oku, Chiyoshi Kasahara, Takehiko Ohkawa, Masashi Hashimoto
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Jun 5, 1991
Inventors
Teruo Oku
Chiyoshi Kasahara
Takehiko Ohkawa
Masashi Hashimoto
Assignee (at issue)
Fujisawa Pharmaceutical 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.