Granted Patent
Utility
US 5,817,584 · App. 08/577,370
High efficiency breathing mask fabrics
Inventors:
Irwin Jerold Singer, Richard Daniel Pike
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Dec 22, 1995
Inventors
Irwin Jerold Singer
Richard Daniel Pike
Assignee (at issue)
Kimberly-Clark Worldwide, 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.