Granted Patent
Utility
US 6,238,752 · App. 09/403,597
Diamino compounds, polyamic acids, polyimides, liquid crystal aligning films using said polyimide films and liquid crystal display devices using said aligning films
Inventors:
Takashi Kato, Nobuyuki Otsuka, Shizuo Murata, Hideo Sato
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Oct 22, 1999
Inventors
Takashi Kato
Nobuyuki Otsuka
Shizuo Murata
Hideo Sato
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.