Granted Patent
Utility
US 4,714,647 · App. 06/858,995
Melt-blown material with depth fiber size gradient
Inventors:
Peter W. Shipp, Jr., Clifford M. Vogt
Patented Case
View Patent ↗
Granted: Dec 22, 1987
Filed: May 2, 1986
Inventors
Peter W. Shipp, Jr.
Clifford M. Vogt
Assignee (at issue)
Kimberly-Clark 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.