US3489724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear copolyamides from caprolactam,adipic acid and a mixture of m- and p-xylylene diamines
Assignee: Teijin Ltd
•
Filing: 1965-05-17
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Granted: 1970-01-13
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Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 Yoshio Iwakura
- 👤 Masaki Nakajima
- 👤 Takeshi Nagaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:38
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/36; D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; D01F6/78; D01F6/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2252555A
Cited
US2374576A
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US2733230A
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GB766927A
Cited
US2985627A
Cited
GB989265A
Cited
US3259606A
Cited
US3386964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |