Granted Patent
Utility
US 4,659,478 · App. 06/716,761
Fluid absorbing method
Inventors:
Bernard E. Stapelfeld, Donald L. Beaver, Jr.
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Mar 27, 1985
Inventors
Bernard E. Stapelfeld
Donald L. Beaver, Jr.
Assignee (at issue)
Sermac Industries, Inc.
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.