US 5346985
DRAWABLE HIGH TENSILE STRENGTH ARAMIDS
Assignee
E.I. DU PONT DE NEMOURS AND COMPANY A CORP. OF DELAWARE
Filed
Sep 30, 1991
Granted
Sep 13, 1994
Location
WILMINGTON DE US
Abstract
Aramids, which in the drawn state have high tensile strengths tensile elongations, and tensile moduli, are made from units derived from selected 2,2'-disubstituted-4,4'-bibenzoic acids, 3,4'-oxydibenzoic acid or 3,4'-dicarboxybenzophenone, p-phenylenediamine, and optionally terephthalic acid. The aramids are useful for ropes and composites.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jan 31, 1992
Rescinded
Mar 31, 1993
Duration
1 year, 2 months
Inventor
- 1ROBERT S. IRWIN
Record Details
- Patent number
- US 5346985
- Application
- 07772383
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
Browse by Assignee
E.I. DU PONT DE NEMOURS AND COMPANY A CORP. OF DELAWAREBack to patent indexSource: USPTO 35 USC §181 secrecy order records