Granted Patent
Utility
US 5,481,023 · App. 08/129,789
Process for the preparation of hydroxyphenylcarboxylates
Inventors:
Christoph Kleiner, Samuel Evans, Ralf Lorenz Schmitt
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Sep 30, 1993
Inventors
Christoph Kleiner
Samuel Evans
Ralf Lorenz Schmitt
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.