US3489722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of aromatic polyester
Assignee: Teijin Ltd
•
Filing: 1966-08-15
•
Granted: 1970-01-13
•
Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Shinta Kotani
- 👤 Yasuhito Bandou
- 👤 Junsuke Takeishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/84; C08G63/87
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2643989A
Cited
US2998412A
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US2820023A
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US2916474A
Cited
US3028366A
Cited
FR1326223A
Cited
GB1016511A
Cited
US3412070A
Cited
US3110547A
Cited
US3245959A
Cited
FR1370632A
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 |