US2870124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing synthetic linear condensation copolyesters using an alkylene carbonate
Assignee: Solutia Inc
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Filing: 1953-06-01
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Granted: 1959-01-20
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Expires: 1973-06-01
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:57
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/64; C08G63/78; C08G63/82; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS FOR MAKING SYNTHETIC LINEAR CONDENSATION COPOLYESTERS COMPRISING FORMING A MIXTURE COMPRIDING (A) AT LEAST TWO DICARBOXYLIC ACIDS WHICH WHEN HAVING SIDE GROUP CONSISTING OF SATURATED ALIPHATIC DICARBOXYLIC ACIDS AND AROMATIC DICARBOXYLIC ACIDS WHICH WHEN HAVING SIDE CHAINS THEREON, ALL OF SAID SIDE CHAINS ARE SATURATED, (B) A GLYCOL, AND (C), A MONNOMERIC ALKYLENE CARBONATE CON TAINING FROM 2 TO 8 CARBON ATOMS IN THEE ALKYLENE GROUP SAID COMPONENTS BEING PRESENT IN THE MIXTURE IN A MOLAR RATIO OF 1 TO 4 MOLES OF (A);UP TO 5.9 MOLES OF (B): 0.1 TO 6 MOLES OF (C), HEATING AND REACHING SAID MIXTURE AT A TEMPERATURE IN THE RANGE OF 80* TO 300* C. UNTIL SOLUTION OF THE MIXTURE OCCURS, AND THEREAFTER CONTAINUING THE HEATING AT A TEMPERATURE SUFFCIENT TO MAINTAIN THE REACTION MASS IN A MOLTEN STATE UNTIL A COPOLYESTER IS PRODUCED.
Claim 2
Dependent Claim
142 words
A PROCESS FOR MAKING SYNTHETIC LINEAR CONDENSATION COPOLYESTERS COMPRISING FORMING A MIXTURE COMPRIDING (A) AT LEAST TWO DICARBOXYLIC ACIDS WHICH WHEN HAVING SIDE GROUP CONSISTING OF SATURATED ALIPHATIC DICARBOXYLIC ACIDS AND AROMATIC DICARBOXYLIC ACIDS WHICH WHEN HAVING SIDE CHAINS THEREON, ALL OF SAID SIDE CHAINS ARE SATURATED, (B) A GLYCOL, AND (C), A MONNOMERIC ALKYLENE CARBONATE CON TAINING FROM 2 TO 8 CARBON ATOMS IN THEE ALKYLENE GROUP SAID COMPONENTS BEING PRESENT IN THE MIXTURE IN A MOLAR RATIO OF 1 TO 4 MOLES OF (A);UP TO 5.9 MOLES OF (B): 0.1 TO 6 MOLES OF (C), HEATING AND REACHING SAID MIXTURE AT A TEMPERATURE IN THE RANGE OF 80* TO 300* C. UNTIL SOLUTION OF THE MIXTURE OCCURS, AND THEREAFTER CONTAINUING THE HEATING AT A TEMPERATURE SUFFCIENT TO MAINTAIN THE REACTION MASS IN A MOLTEN STATE UNTIL A COPOLYESTER IS PRODUCED.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |