Granted Patent
Utility
US 4,247,694 · App. 05/949,828
Complexes of metal salts of hydroxybenzoic acids and piperidines
Inventor:
Michael Rasberger
Patented Case
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Granted: Jan 27, 1981
Filed: Oct 10, 1978
Inventor
Michael Rasberger
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.