Granted Patent
Utility
US 4,847,017 · App. 07/067,524
Hydroxyphosphonocarboxylic acids
Inventors:
Brian G. Clubley, David W. Cartmell, David C. Parker
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Jun 29, 1987
Inventors
Brian G. Clubley
David W. Cartmell
David C. Parker
Assignee (at issue)
Ciga-Geigy Corporation
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.