Granted Patent
Utility
US 5,344,825 · App. 08/048,395
Methanediphosphonic acid formulations with ion exchangers
Inventors:
Satish C. Khanna, Jonathan Green
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Apr 14, 1993
Inventors
Satish C. Khanna
Jonathan Green
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.