Granted Patent
Utility
US 5,486,569 · App. 08/314,363
Method of increasing the size and/or absorption under load of superabsorbent polymers by surface cross-linking and subsequent agglomeration of undersized particcles
Inventors:
John A. Henderson, Anthony S. Tomlin, David M. Lucas
Patented Case
View Patent ↗
Granted: Jan 23, 1996
Filed: Sep 28, 1994
Inventors
John A. Henderson
Anthony S. Tomlin
David M. Lucas
Assignee (at issue)
American Colloid 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.