Granted Patent
Utility
US 4,616,063 · App. 06/744,872
Water absorbent polymer composition
Inventor:
Bi Le-Khac
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Jun 17, 1985
Inventor
Bi Le-Khac
Assignee (at issue)
Atlantic Richfield 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.