IP Library › Granted Patent US 4,263,146
Granted Patent Utility
US 4,263,146 · App. 06/050,563

Process for removing cationic substances from aqueous solutions

Inventors: Hans Wegmuller, Rudolf F. Wurster
Patented Case View Patent ↗
Granted: Apr 21, 1981 Filed: Jun 21, 1979
Inventors
Hans Wegmuller
Rudolf F. Wurster
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.

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 4,263,146
App. No.
06/050,563
Filed
1979-06-21
Granted
1981-04-21
Kind
A