IP Library › Granted Patent US 4,556,550
Granted Patent Utility
US 4,556,550 · App. 06/543,360

Process for the preparation of high-level ion-exchanged forms of Zeolites F and Zeolite W

Inventors: Ronald J. Ross, John D. Sherman
Patented Case View Patent ↗
Granted: Dec 3, 1985 Filed: Oct 19, 1983
Inventors
Ronald J. Ross
John D. Sherman
Assignee (at issue)
Union Carbide 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.

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 4,556,550
App. No.
06/543,360
Filed
1983-10-19
Granted
1985-12-03
Kind
A