Granted Patent
Utility
US 4,606,875 · App. 06/483,798
Process for preparing shaped articles of rigid rod heterocyclic liquid crystalline polymers
Inventors:
Edward C. Chenevey, Thaddeus E. Helminiak
Patented Case
View Patent ↗
Granted: Aug 19, 1986
Filed: Apr 11, 1983
Inventors
Edward C. Chenevey
Thaddeus E. Helminiak
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.