Granted Patent
Utility
US 4,892,872 · App. 07/261,067
Benzoxazine compounds and pharmaceutical use thereof
Inventors:
Tetsuya Tahara, Takeshi Kawakita, Mitsuyoshi Yasumoto, Takemi Fukuda
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Oct 24, 1988
Inventors
Tetsuya Tahara
Takeshi Kawakita
Mitsuyoshi Yasumoto
Takemi Fukuda
Assignee (at issue)
Yoshitomi Pharmaceutical Industries, 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.