IP Library › Granted Patent US 5,171,823
Granted Patent Utility
US 5,171,823 · App. 07/814,340

Melt processable thermotropic wholly aromatic polyester containing 6-hydroxy-2-naphthoic acid moieties

Inventors: Larry F. Charbonneau, Gordon Calundann
Patented Case View Patent ↗
Granted: Dec 15, 1992 Filed: Dec 27, 1991
Inventors
Larry F. Charbonneau
Gordon Calundann
Assignee (at issue)
Hoechst Celanese 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,171,823
App. No.
07/814,340
Filed
1991-12-27
Granted
1992-12-15
Kind
A