Granted Patent
Utility
US 5,976,209 · App. 09/195,282
Melt blown product formed as a fibrous layered web of filter media
Inventor:
Kyung-Ju Choi
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Nov 18, 1998
Inventor
Kyung-Ju Choi
Assignee (at issue)
AAF International, 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.