Granted Patent
Utility
US 4,578,489 · App. 06/535,487
Ammonium stannates-(IV)
Inventors:
Wolfgang Wehner, Reinhardt Grade
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: Sep 26, 1983
Inventors
Wolfgang Wehner
Reinhardt Grade
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.