Granted Patent
Utility
US 5,447,727 · App. 07/960,675
Water-absorbent polymer having improved properties
Inventor:
Andrew T. Graham
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Oct 14, 1992
Inventor
Andrew T. Graham
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.