US2932662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of bis (beta-hydroxyethyl) terephthalate with ethylene oxide
Assignee: Solutia Inc
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Filing: 1958-08-01
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Granted: 1960-04-12
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Expires: 1978-08-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Ringwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:58
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76; C07C69/80; C07C69/82; C07C67/00; C07C67/24; C07C67/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN THE PROCESS OF PRODUCING BIS(B-HYDROXYETHYL) TEREPHTHALATE BY CAUSING ETHYLENE OXIDE TO REACT WITH TEREPHTHALIC ACID IN AQUEOUS SUSPENSION IN THE PRESENCE OF AN ALKALINE CATALYST WHICH FORMS A WATER-SOLUBLE TEREPHTHALATE THEREWITH, THE IMPROVEMENT COMPRISING REACTING ETHYLENE OXIDE AND TEREPHTHALIC ACID IN AN AQUEOUS SUSPENSION MAINTAINED AT A TEMPERATURE ABOUT 70-110*C. AND CONTAINING WATER IN AN AMOUNT OF AT MOST THREE TIMES AND AT LEAST ONE TIME THE AMOUNT OF TEREPHTHALIC ACID IN PARTS BY WEIGHT AND UNDER A GAUGE PRESSURE BETWEEN 3-25 POUNDS PER SQUARE INCH.
Claim 2
Dependent Claim
87 words
IN THE PROCESS OF PRODUCING BIS(B-HYDROXYETHYL) TEREPHTHALATE BY CAUSING ETHYLENE OXIDE TO REACT WITH TEREPHTHALIC ACID IN AQUEOUS SUSPENSION IN THE PRESENCE OF AN ALKALINE CATALYST WHICH FORMS A WATER-SOLUBLE TEREPHTHALATE THEREWITH, THE IMPROVEMENT COMPRISING REACTING ETHYLENE OXIDE AND TEREPHTHALIC ACID IN AN AQUEOUS SUSPENSION MAINTAINED AT A TEMPERATURE ABOUT 70-110*C. AND CONTAINING WATER IN AN AMOUNT OF AT MOST THREE TIMES AND AT LEAST ONE TIME THE AMOUNT OF TEREPHTHALIC ACID IN PARTS BY WEIGHT AND UNDER A GAUGE PRESSURE BETWEEN 3-25 POUNDS PER SQUARE INCH.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |