US3245959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic copolyesterification
Assignee: ExxonMobil Oil Corp
•
Filing: 1962-04-04
•
Granted: 1966-04-12
•
Expires: 1982-04-04
Abstract
No abstract record available.
Inventors
- 👤 Gerald P Roeser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:05
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08G63/78; C08G63/82; C08G63/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A METHOD OF PRODUCING A RESINOUS COPOLYESTER OF REACTANTS COMPRISING (A) FROM ABOUT 25 TO 56 EQUIVALENT PERCENT OF DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC ACID, TEREPHTHALIC ACID AND MIXTURES THEREOF, (B) FROM ABOUT 15 TO 46 EQUIVALENT PERCENT OF ALIPHATIC DIOL HAVING FROM 2-10 CARBON ATOMS, AND (C) FROM ABOUT 13 TO 44 EQUIVALENT PERCENT OF A SATURATED ALIPHATIC POLYHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXYL GROUPS, COMPRISING POLYESTERIFYING ALL OF SAID COMPONENT (C) WITH A PORTION OF SAID COMPONENT (A), SAID COMPONENT (C) BEING IN EXCESS OF AT LEAST 1.5:1 WITH RESPECT TO SAID PORTION OF COMPONENT (A), ADMIXING THE PRODUCT SO-OBTAINED WITH THE BALANCE OF SAID COMPONENT (A) AND WITH SAID COMPONENT (B) AND MAINTAINING SAID MIXTURE AT A TEMPERATURE OF AT LEAST ABOUT 160*C. IN THE PRESENCE OF AT LEAST A TRACE OF METAL ION DISSOLVED THEREIN AND SELECTED FROM THE GROUP CONSISTING OF IONS OF TITANIUM, TIN, ANTIMONY AND BISMUTH, AND REMOVING WATER OF ESTERIFICATION FROM THE REACTION MIXTURE AS ESTERIFICATION PROCEEDS TO PRODUCE SAID RESINOUS COPOLYESTER.
Claim 2
Independent Claim
175 words
A METHOD OF PRODUCING A RESINOUS COPOLYESTER OF REACTANTS COMPRISING (A) FROM ABOUT 25 TO 56 EQUIVALENT PERCENT OF DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC ACID, TEREPHTHALIC ACID AND MIXTURES THEREOF, (B) FROM ABOUT 15 TO 46 EQUIVALENT PERCENT OF ALIPHATIC DIOL HAVING FROM 2-10 CARBON ATOMS, AND (C) FROM ABOUT 13 TO 44 EQUIVALENT PERCENT OF A SATURATED ALIPHATIC POLYHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXYL GROUPS, COMPRISING POLYESTERIFYING ALL OF SAID COMPONENT (C) WITH A PORTION OF SAID COMPONENT (A), SAID COMPONENT (C) BEING IN EXCESS OF AT LEAST 1.5:1 WITH RESPECT TO SAID PORTION OF COMPONENT (A), ADMIXING THE PRODUCT SO-OBTAINED WITH THE BALANCE OF SAID COMPONENT (A) AND WITH SAID COMPONENT (B) AND MAINTAINING SAID MIXTURE AT A TEMPERATURE OF AT LEAST ABOUT 160*C. IN THE PRESENCE OF AT LEAST A TRACE OF METAL ION DISSOLVED THEREIN AND SELECTED FROM THE GROUP CONSISTING OF IONS OF TITANIUM, TIN, ANTIMONY AND BISMUTH, AND REMOVING WATER OF ESTERIFICATION FROM THE REACTION MIXTURE AS ESTERIFICATION PROCEEDS TO PRODUCE SAID RESINOUS COPOLYESTER.
References Cited (Backward Citations)
US2727881A
Cited
US2937160A
Cited
US2936296A
Cited
GB835743A
Cited
US3050548A
Cited
US3056818A
Cited
US2917414A
Cited
US2956985A
Cited
US3055867A
Cited
US3057824A
Cited
US3066108A
Cited
US3053883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |