Patent US2744087A successfully refreshed from Google Patents.
US2744087A
Expired / Lapsed
US
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Polyester from terephthalic acid, ethylene glycol and polyethylene glycol
Assignee: EIDP Inc
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Filing: 1951-12-11
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Granted: 1956-05-01
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Expires: 1971-12-11
Abstract
No abstract record available.
Inventors
- 👤 Mark D Suyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:48
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A DYEABLE POLYMERIC ESTER DERIVED FROM TEREPHTHALIC ACID, ETHYLENE GLYCOL AND A POLYETHYLENE GLYCOL HAVING A FORMULA
Claim 2
Dependent Claim
17 words
A DYEABLE POLYMERIC ESTER DERIVED FROM TEREPHTHALIC ACID, ETHYLENE GLYCOL AND A POLYETHYLENE GLYCOL HAVING A FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |