Granted Patent
Utility
US 5,405,887 · App. 08/249,994
Porous film
Inventors:
Kenji Morita, Kohichi Uchiki, Hosei Shinoda
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: May 27, 1994
Inventors
Kenji Morita
Kohichi Uchiki
Hosei Shinoda
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.