Granted Patent
Utility
US 5,510,176 · App. 08/295,070
Polytetrafluoroethylene porous film
Inventors:
Atsushi Nakamura, Satoshi Nakashima
Patented Case
View Patent ↗
Granted: Apr 23, 1996
Filed: Aug 26, 1994
Inventors
Atsushi Nakamura
Satoshi Nakashima
Assignees (at issue)
Mitsubishi Kasei Corporation
NIPPON VALQUA INDUSTRIES, LTD.
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.