Granted Patent
Utility
US 4,888,231 · App. 07/068,598
Absorbent core having a dusting layer
Inventor:
John J. Angstadt
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Jun 30, 1987
Inventor
John J. Angstadt
Assignee (at issue)
The Procter & Gamble 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.