Granted Patent
Utility
US 4,614,745 · App. 06/722,632
Anti-allergic 3-(carboxycarbonyl)amino benzothiopyran-4-one derivatives, compositions, and method of use therefor
Inventors:
Atso Ilvespaa, Georges Haas
Patented Case
View Patent ↗
Granted: Sep 30, 1986
Filed: Apr 12, 1985
Inventors
Atso Ilvespaa
Georges Haas
Assignee (at issue)
Ciba-Geigy
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.