Granted Patent
Utility
US 4,497,813 · App. 06/378,165
Derivatives of 3-aminopropane-1,2-diol
Inventors:
Franz Ostermayer, Markus Zimmermann
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: May 14, 1982
Inventors
Franz Ostermayer
Markus Zimmermann
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.