Granted Patent
Utility
US 4,336,148 · App. 05/938,172
Complex compound, process for their preparation, and their use
Inventors:
Hermann O. Wirth, Hans-Helmut Friedrich
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Aug 30, 1978
Inventors
Hermann O. Wirth
Hans-Helmut Friedrich
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.