IP Library › Granted Patent US 4,179,400
Granted Patent Utility
US 4,179,400 · App. 06/006,322

Process for preparing catalytic solutions of sulfonium salts

Inventors: Jung-Hsien Tsao, Arthur D. Ketley
Patented Case View Patent ↗
Granted: Dec 18, 1979 Filed: Jan 25, 1979
Inventors
Jung-Hsien Tsao
Arthur D. Ketley
Assignee (at issue)
W. R. Grace & Co.

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 4,179,400
App. No.
06/006,322
Filed
1979-01-25
Granted
1979-12-18
Kind
A