Granted Patent
Utility
US 4,623,745 · App. 06/755,383
Process for producing phenolic thiocarboxylic esters
Inventors:
Siegfried Rosenberger, Werner Stegmann
Patented Case
View Patent ↗
Granted: Nov 18, 1986
Filed: Jul 16, 1985
Inventors
Siegfried Rosenberger
Werner Stegmann
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.