US2862962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester exchange catalyzed by cationexchange materials
Assignee: Celanese Corp
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Filing: 1956-02-06
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Granted: 1958-12-02
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Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 George B Ulvild
- 👤 Hopkins W Tatum
- 👤 Winfield C Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:42
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; C; C07; C07C; C07C67/00; C07C67/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
PROCESS FOR THE TREATMENT OF A MIXTURE OF ESTERS, WHICH COMPRISES CONTINUOUSLY PASSING A MIXTURE OF ESTERS, COMPRISING AN ESTER OF A LOWER ALKANOL AND A LOWERTERS ALKANOIC ACID AND AN ESTER OF ANOTHER LOWER ALKANOL AND ANOTHER LOWER ALKANOIC ACID, TOGETHER WITH AN HYDROXYL COMPOUND, SELECTED FROM THE GROUP CONSISTING OF A LOWER ALKANOL AND WATER, THE AMOUNT OF SAID HYDROXYL COMPOUND BEING A MINOR FRACTION OF THE STOICHIOMETRIC AMOUNT NECESSARY TO EFFECT COMPLETE SPLITTING OF SAID ESTERS, INTO A REACTION ZONE COMPRISING ABED OF AN ACIDIC CATION-EXCHANGE MATERIAL TO EFFECT AN ESTER-EXCHANGE REACTION BETWEEN SAID ESTERS, SAID HYDROXYL COMPOUND ACTING TO MAINTAIN THE ACTIVITY FOR ESTER INTERCHANGE OF SAID CATIONIC EXCHANGE MATERIAL.
Claim 2
Dependent Claim
114 words
PROCESS FOR THE TREATMENT OF A MIXTURE OF ESTERS, WHICH COMPRISES CONTINUOUSLY PASSING A MIXTURE OF ESTERS, COMPRISING AN ESTER OF A LOWER ALKANOL AND A LOWERTERS ALKANOIC ACID AND AN ESTER OF ANOTHER LOWER ALKANOL AND ANOTHER LOWER ALKANOIC ACID, TOGETHER WITH AN HYDROXYL COMPOUND, SELECTED FROM THE GROUP CONSISTING OF A LOWER ALKANOL AND WATER, THE AMOUNT OF SAID HYDROXYL COMPOUND BEING A MINOR FRACTION OF THE STOICHIOMETRIC AMOUNT NECESSARY TO EFFECT COMPLETE SPLITTING OF SAID ESTERS, INTO A REACTION ZONE COMPRISING ABED OF AN ACIDIC CATION-EXCHANGE MATERIAL TO EFFECT AN ESTER-EXCHANGE REACTION BETWEEN SAID ESTERS, SAID HYDROXYL COMPOUND ACTING TO MAINTAIN THE ACTIVITY FOR ESTER INTERCHANGE OF SAID CATIONIC EXCHANGE MATERIAL.
References Cited (Backward Citations)
US1860092A
Cited
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 |