Granted Patent
Utility
US 5,728,451 · App. 08/824,449
Breathable non-woven composite viral penetration barrier fabric and fabrication process
Inventors:
John D. Langley, Barry Hinkle
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Mar 26, 1997
Inventors
John D. Langley
Barry Hinkle
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.