Granted Patent
Utility
US 4,562,244 · App. 06/595,004
Process for forming thermally stable thermotropic liquid crystalline polyesters of predetermined chain length utilizing aliphatic dicarboxylic acid
Inventor:
Hyun-Nam Yoon
Patented Case
View Patent ↗
Granted: Dec 31, 1985
Filed: Mar 29, 1984
Inventor
Hyun-Nam Yoon
Assignee (at issue)
Celanese GmbH
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.