US3249652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented copolyester of 2, 2, 4, 4-tetramethyl-1, 3-cyclobutylene terephthalate andethylene terephthalate
Assignee: EIDP Inc
•
Filing: 1962-10-24
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Granted: 1966-05-03
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Expires: 1982-10-24
Abstract
No abstract record available.
Inventors
- 👤 Quisenberry Richard Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:28
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/199
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2936324A
Cited
FR1303888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |