US2862957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing alkyl, hydroxyalkyl esters of terephthalic acid
Assignee: Glanzstoff AG
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Filing: 1954-08-02
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Granted: 1958-12-02
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Expires: 1974-08-02
Abstract
No abstract record available.
Inventors
- 👤 Siggel Erhard
- 👤 Macura Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:57
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
66 words
METHOD OF MANUFACTURING ESTERS OF TEREPHTHALIC ACID HAVING TWO DIFFERENT ALCOHOLIC COMPONENTS ONE OF SAID COMPONENTS BEING A MEMBER OF THE GROUP CONSISTING OF METHANOL AND ETHANOL AND THE OTHER COMPONENT BEING ETHYLENE GLUCOL, WITH COMPRISES REACTING MONOESTER OF A MONOHYDRIC ALCOHOL AFORESAID AND TEREPHTHALIC ACID DISSOLVE IN AN INSERT NON-AQUEOUS SOLVENT WITH ETHYLENE OXIDE AT A TEMPERATURE IN THE RANGE OF ABOUT 80* TO 110*C.
Claim 2
Dependent Claim
66 words
METHOD OF MANUFACTURING ESTERS OF TEREPHTHALIC ACID HAVING TWO DIFFERENT ALCOHOLIC COMPONENTS ONE OF SAID COMPONENTS BEING A MEMBER OF THE GROUP CONSISTING OF METHANOL AND ETHANOL AND THE OTHER COMPONENT BEING ETHYLENE GLUCOL, WITH COMPRISES REACTING MONOESTER OF A MONOHYDRIC ALCOHOL AFORESAID AND TEREPHTHALIC ACID DISSOLVE IN AN INSERT NON-AQUEOUS SOLVENT WITH ETHYLENE OXIDE AT A TEMPERATURE IN THE RANGE OF ABOUT 80* TO 110*C.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |