Granted Patent
Utility
US 4,639,338 · App. 06/759,985
Preparation of crystalline disodium 3-amino-1-hydroxypropane-1,1-diphosphonate pentahydrate
Inventors:
Peter H. Stahl, Beat Schmitz
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Jul 29, 1985
Inventors
Peter H. Stahl
Beat Schmitz
Assignees (at issue)
Ciba-Geigy
Henkel Kommanditgesellschaft auf Aktien
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.