Granted Patent
Utility
US 5,906,890 · App. 08/894,191
Polypropylene fiber, a method for manufacture thereof, and a non-woven fabric made of the same
Inventors:
Masahiko Taniguchi, Hidemi Ito, Yoshimi Tsujiyama
Patented Case
View Patent ↗
Granted: May 25, 1999
Filed: Aug 14, 1997
Inventors
Masahiko Taniguchi
Hidemi Ito
Yoshimi Tsujiyama
Assignee (at issue)
Chisso Corporation
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.