US3397254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxy terminated polyesters prepared from tribasic acid anhydrides and hydroxy terminated polyesters
Assignee: Union Carbide Corp
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Filing: 1964-09-21
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Granted: 1968-08-13
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 Wynstra John
- 👤 John J Gardikes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:27
CPC Classifications
C; C09; C09D; C09D167/00; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08L; C08L63/00; C09J; C09J167/00; C08L2666/00; C08L2666/02; C08L2666/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2954355A
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US3242142A
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US3067157A
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US3067158A
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US3062770A
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US3075936A
Cited
US3275709A
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US3223666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |