US3265762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented linear copolyesters of 2, 5-disubstituted terephthalic acids
Assignee: EIDP Inc
•
Filing: 1962-10-24
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Granted: 1966-08-09
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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
2026-10-23 08:57
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A SEGMENTED LINEAR COPOLYESTER HAVING AN INHERENT VISCOSITY OF AT LEAST 0.3, AS DETERMINED AT 25*C. FOR A SOLUTION OF 0.25 G. OF THE XOPOLYESTER DISSOLVED IN A MIXTURE OF 75 MILLITERS OF METHYLENE CHLORIDE AND 25 MILLITERS OF TRIFLUOROACETIC ACID, AND CHARACTERIZED BY ALTERNATING FIRST AND SECOND POLYESTER SEGMENTS CONNECTED THROUGH ESTER LINKAGES, THE FIRST POLYESTER SEGMENT CONSISTING ESSENTIALLY OF A SUCCESSION OF 3 TO ABOUT 200 RECURING STRUCTURAL UNITS OF ETHYLENE TEREPHALATE, AND THE SECOND POLYESTER SEGMENT CONSISTING ESSENTIALLY OF A SUCCESSION OF 3 TO ABOUT 200 RECURRING STRUCTUALY OF A SUCCESSION OF 3 TO ABOUT BOXYLIC ACID PRESENTED BY THE FORMULA
Claim 2
Dependent Claim
104 words
A SEGMENTED LINEAR COPOLYESTER HAVING AN INHERENT VISCOSITY OF AT LEAST 0.3, AS DETERMINED AT 25*C. FOR A SOLUTION OF 0.25 G. OF THE XOPOLYESTER DISSOLVED IN A MIXTURE OF 75 MILLITERS OF METHYLENE CHLORIDE AND 25 MILLITERS OF TRIFLUOROACETIC ACID, AND CHARACTERIZED BY ALTERNATING FIRST AND SECOND POLYESTER SEGMENTS CONNECTED THROUGH ESTER LINKAGES, THE FIRST POLYESTER SEGMENT CONSISTING ESSENTIALLY OF A SUCCESSION OF 3 TO ABOUT 200 RECURING STRUCTURAL UNITS OF ETHYLENE TEREPHALATE, AND THE SECOND POLYESTER SEGMENT CONSISTING ESSENTIALLY OF A SUCCESSION OF 3 TO ABOUT 200 RECURRING STRUCTUALY OF A SUCCESSION OF 3 TO ABOUT BOXYLIC ACID PRESENTED BY THE FORMULA
References Cited (Backward Citations)
US3123587A
Cited
US3037964A
Cited
US3117107A
Cited
US3117950A
Cited
GB885492A
Cited
FR1303888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |