IP Library › Granted Patent US 5,171,237
Granted Patent Utility
US 5,171,237 · App. 07/772,772

Method of making absorbent particles

Inventors: John Poccia, Kevin J. Ovans, Heinz A. Pieniak
Patented Case View Patent ↗
Granted: Dec 15, 1992 Filed: Oct 7, 1991
Inventors
John Poccia
Kevin J. Ovans
Heinz A. Pieniak
Assignee (at issue)
Weyerhaeuser NR Company

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 5,171,237
App. No.
07/772,772
Filed
1991-10-07
Granted
1992-12-15
Kind
A