Granted Patent
Utility
US 5,419,955 · App. 08/079,694
Method for immobilizing superabsorbent polymer and products derived therefrom
Inventors:
Kenneth C. Ehrhardt, John B. Hopkins, Jr., Joanne C. Maheras, David R. McWilliams
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Jun 17, 1993
Inventors
Kenneth C. Ehrhardt
John B. Hopkins, Jr.
Joanne C. Maheras
David R. McWilliams
Assignee (at issue)
Hoechst Celanese Corporation
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.