IP Library Granted Patent US 5,972,164
Granted Patent Utility
US 5,972,164 · App. 08/972,072

Persulfate mixtures for repulping wet strength paper

Inventors: Frank E. Caropreso, Dean S. Thorp, Robert H. Tieckelmann
Patented Case View Patent ↗
Granted: Oct 26, 1999 Filed: Nov 17, 1997
Inventors
Frank E. Caropreso
Dean S. Thorp
Robert H. Tieckelmann
Assignee (at issue)
FMC 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 5,972,164
App. No.
08/972,072
Filed
1997-11-17
Granted
1999-10-26
Kind
A