US3639335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally-stable polyamide compositions
Assignee: Toray Industries Inc
•
Filing: 1970-06-12
•
Granted: 1972-02-01
•
Expires: 1990-06-12
Abstract
Abstract NYLON COMPOSITIONS WHICH ARE FORMED FROMPOLYAMIDES SUCH AS POLYCAPROLACTAM HAVE IMPROVED HEAT AND LIGHT STABILTIY BY INCORPORATING A COPPER SALTE DERIVED FROM THE REACTION OF A COPER HALIDE AND XYLENEDIAMINE. THE RESULTING POLYAMIDES WHICH ARE COLOR-FREE MAY OPTIONALLY CONTAIN A HINDERED PHENOL ANTIOXIDANT.
Inventors
- 👤 Shigeru Fujii
- 👤 Iso Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:40
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |