Granted Patent
Utility
US 6,830,849 · App. 09/936,007
High crystalline polypropylene microporous membrane, multi-component microporous membrane and methods for preparing the same
Inventors:
Sang-Young Lee, Byeong-In Ahn, Sung Gap IM, Soon Yong Park, Heon-Sik Song, You-Jin Kyung
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Sep 7, 2001
Inventors
Sang-Young Lee
Byeong-In Ahn
Sung Gap IM
Soon Yong Park
Heon-Sik Song
You-Jin Kyung
Assignee (at issue)
LG Chemical 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.