Granted Patent
Utility
US 5,945,210 · App. 08/760,318
Porous film and preparation process thereof
Inventors:
Katsumi Senba, Toshiyuki Ishii, Takayuki Kajihara, Tsutomu Iseki, Toshiyuki Enomoto
Patented Case
View Patent ↗
Granted: Aug 31, 1999
Filed: Dec 4, 1996
Inventors
Katsumi Senba
Toshiyuki Ishii
Takayuki Kajihara
Tsutomu Iseki
Toshiyuki Enomoto
Assignee (at issue)
MITSUI CHEMICALS, 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.