Granted Patent
Utility
US 4,880,868 · App. 07/136,810
Extended shelf life water-absorbing composition which facilitates fiber formation
Inventor:
Bi Le-Khac
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Dec 17, 1987
Inventor
Bi Le-Khac
Assignee (at issue)
Arco Chemical Technology, L.P.
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.