IP Library › Granted Patent US 5,548,022
Granted Patent Utility
US 5,548,022 · App. 08/441,434

Aqueous dispersion type stain-proofing agent and method for its production

Inventors: Katsuji Ito, Satoshi Kamata
Patented Case View Patent ↗
Granted: Aug 20, 1996 Filed: May 15, 1995
Inventors
Katsuji Ito
Satoshi Kamata
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,548,022
App. No.
08/441,434
Filed
1995-05-15
Granted
1996-08-20
Kind
A