Granted Patent
Utility
US 4,833,222 · App. 07/111,229
Crosslinker stabilizer for preparing absorbent polymers
Inventors:
Jonathan H. Siddall, Thomas C. Johnson
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Oct 22, 1987
Inventors
Jonathan H. Siddall
Thomas C. Johnson
Assignee (at issue)
THE DOW CHEMICAL 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.