Wholly aromatic polyester capable of forming an anisotropic melt phase consisting essentially of para-oxybenzoyl moiety, bromo-substituted-para-oxybenzoyl moiety, and meta-oxybenzoyl moiety

Granted: Feb 15, 1983 Filed: Aug 3, 1981

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.