IP Library › Granted Patent US 8,716,433
Granted Patent B2
US 8,716,433 · App. 13/559,669 · Granted May 6, 2014

Aramid copolymer

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
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 8,716,433
App. No.
13/559,669
Granted
May 6, 2014
Kind
B2
Abstract

The invention concerns polymer comprising residues of 2-(4-amino phenyl)-5 (6) amino benzimidazole (DAPBI), paraphenylene diamine, and terephthaloyl dichloride, the polymer having a IPC peak block ratio of 1.45 to 1.47 and an inherent viscosity of greater than 2 dl/g.

Claims (2)

1. A polymer comprising residues of 2-(4-amino phenyl)-5 (6) amino benzimidazole (DAPBI), paraphenylene diamine, and terephthaloyl dichloride, the polymer having a IPC peak block ratio of 1.45 to 1.47 and an inherent viscosity of greater than 2 dl/g.

2. The polymer of claim 1 having an inherent viscosity of 4 dl/g or greater.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 25, 2019
From: E. I. DU PONT DE NEMOURS AND COMPANY
To: DUPONT SAFETY & CONSTRUCTION, INC.
Reel/Frame 049585/0450 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 19, 2012
From: LEE, KIU-SEUNG
To: E. I. DU PONT DE NEMOURS AND COMPANY
Reel/Frame 028809/0246 →