US2831832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyesters of a glycol, sulfonyldi-benzoic acid and omega-hydroxy acid
Assignee: Eastman Kodak Co
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Filing: 1954-09-09
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Granted: 1958-04-22
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Expires: 1974-09-09
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:55
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A COPOLYESTER OBTAINED BY THE SIMULTANEOUS COREACTION OF A GLYCOL CONTAINING 2-12 CARBON ATOMS, AND ACIDIC MATERIAL CONSISTING OF 30-85 MOLE PERCENT OF 4,4''-SULFONYLDIBENXOIC ACID AND 70-15 MOLE PERCENT OF W-HYDROXY ACID SELECTED FROM THE GROUP CONSISTING OF GLYCOLIC ACID HYDROXY-PIVALIC ACID, 6-HYDROXYHEXANOIC ACID, 7-HYDROXYHEPTANOIC ACIDM 8-HYDROXYOCTANOIC ACID, 9-HYDROXYNONANOIC ACID, 10 HYDROXYDECANOIC ACID AND 11-HYDROXYUNDECANOIC ACID, SAID COPOLYESTER BEING SPINNABLE AND HAVING A MELTING POINT OF AT LEAST 200*C., SAID COREACTION BEING EFFECTED AT 180-300*C. TO AN INHERENT VISOCITY OF AT LEAST 0.4 USING AN AMOUNT OF GLYCOL AT LEAST EQUIVALENT TO THE AMOUNT OF SAID 4,4''-SULFONYLDIBENZOIC ACID.
Claim 2
Dependent Claim
98 words
A COPOLYESTER OBTAINED BY THE SIMULTANEOUS COREACTION OF A GLYCOL CONTAINING 2-12 CARBON ATOMS, AND ACIDIC MATERIAL CONSISTING OF 30-85 MOLE PERCENT OF 4,4''-SULFONYLDIBENXOIC ACID AND 70-15 MOLE PERCENT OF W-HYDROXY ACID SELECTED FROM THE GROUP CONSISTING OF GLYCOLIC ACID HYDROXY-PIVALIC ACID, 6-HYDROXYHEXANOIC ACID, 7-HYDROXYHEPTANOIC ACIDM 8-HYDROXYOCTANOIC ACID, 9-HYDROXYNONANOIC ACID, 10 HYDROXYDECANOIC ACID AND 11-HYDROXYUNDECANOIC ACID, SAID COPOLYESTER BEING SPINNABLE AND HAVING A MELTING POINT OF AT LEAST 200*C., SAID COREACTION BEING EFFECTED AT 180-300*C. TO AN INHERENT VISOCITY OF AT LEAST 0.4 USING AN AMOUNT OF GLYCOL AT LEAST EQUIVALENT TO THE AMOUNT OF SAID 4,4''-SULFONYLDIBENZOIC ACID.
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) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |