Patent US3496149A successfully refreshed from Google Patents.
US3496149A
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US
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Process for producing polyamides of high degree of polymerization
Assignee: Teijin Ltd
•
Filing: 1968-10-29
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Granted: 1970-02-17
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Expires: 1988-10-29
Abstract
No abstract record available.
Inventors
- 👤 Shigemitsu Tsunawaki
- 👤 Michio Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:16
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3090773A
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US3106548A
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US3043805A
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US3109835A
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US3040005A
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US3155637A
Cited
US3171829A
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US3294756A
Cited
US3254138A
Cited
US3295182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |