Granted Patent
Utility
US 6,620,339 · App. 09/581,852
Polyamic acid composition, liquid crystal aligning film, and liquid crystal display element
Inventors:
Itsuo Shimizu, Kumiko Hara, Haruo Kato, Satoshi Tanioka, Shizuo Murata
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Jun 19, 2000
Inventors
Itsuo Shimizu
Kumiko Hara
Haruo Kato
Satoshi Tanioka
Shizuo Murata
Assignee (at issue)
Chisso Corporation
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.