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Patent US3696074A successfully refreshed from Google Patents.
US3696074A
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Copolyamide from (a) dodecamethylene diamine,(b) hexamethylene diamine,(c) terephthalic acid and (d) adipic acid
Assignee: Toray Industries Inc
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Filing: 1970-03-24
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Granted: 1972-10-03
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Expires: 1990-03-24
Abstract
Abstract A NOVEL COPOLYAMIDE USEFUL AS A TEXTILE FIBER IS SYNTHESIZED FROM (A) DODECAMETHYLENEDIAMINE, (B) HEXAMETHYLENEDIAMINE, (C) TEREPHTHALIC ACID AND (D) ADIPIC ACID.
Inventors
- 👤 Yoshizo Tsuda
- 👤 Akinori Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:24
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265
Claims Analysis
Total Claims: 0
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |