Granted Patent
Utility
US 6,315,822 · App. 09/435,208
Phosphate type water and oil repellent composition
Inventors:
Kazuya Oharu, Minako Shindo
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Nov 5, 1999
Inventors
Kazuya Oharu
Minako Shindo
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.