Granted Patent
Utility
US 4,898,977 · App. 07/085,437
Processes for the preparation of 5-amino-4-hydroxyvaleric acid derivatives
Inventors:
Peter Herold, Christof Angst
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Aug 13, 1987
Inventors
Peter Herold
Christof Angst
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.