Granted Patent
Utility
US 4,639,253 · App. 06/802,067
Nonwoven surgical sponge with X-ray detectable element
Inventors:
John Dyer, John W. Kennette, Alton H. Bassett, Stanley Dean Hall
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Nov 25, 1985
Inventors
John Dyer
John W. Kennette
Alton H. Bassett
Stanley Dean Hall
Assignee (at issue)
Johnson & Johnson Products, 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.