Granted Patent
Utility
US 6,348,271 · App. 09/445,194
Film having gas permeability
Inventors:
Shinji Nakata, Youichi Kugimiya, Chikashi Okayama, Takanori Nakashima, Yuji Ando
Patented Case
View Patent ↗
Granted: Feb 19, 2002
Filed: Dec 2, 1999
Inventors
Shinji Nakata
Youichi Kugimiya
Chikashi Okayama
Takanori Nakashima
Yuji Ando
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.