Granted Patent
Utility
US 6,299,773 · App. 09/445,955
Porous polyvinylidene fluoride resin film and process for producing the same
Inventors:
Masakazu Takamura, Hitoshi Yoshida
Patented Case
View Patent ↗
Granted: Oct 9, 2001
Filed: Dec 16, 1999
Inventors
Masakazu Takamura
Hitoshi Yoshida
Assignee (at issue)
ASAHI KASEI KOGYO CO., 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.