US2587904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esterification of monohydric ether alcohols
Assignee: EIDP Inc
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Filing: 1949-10-27
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Granted: 1952-03-04
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Expires: 1969-10-27
Abstract
No abstract record available.
Inventors
- 👤 Ryan Cornelius John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:28
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/08; C08; C08K; C08K5/00; C08K5/04; C08K5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE PROCESS OF PREPARING ESTERS FROM ADIPIC ACID AND BUTOXYETHANOL WHICH CONTAINS SMALL AMOUNTS OF A COLOR PRODUCING PEROXIDE WHICH COMPRISES MIXING ABOUT 6,838 PARTS OF BUTOXYETHANOL WITH ABOUT 1,441 PARTS OF TOLUENE, HEATING THE SAME TO FROM 90* C. TO 95* C., ADDING ABOUT 4,000 PARTS OF ADIPIC ACID TO THE MIXTURE, CONTINUING THE HEATING AND ADDING TO THE MIXTURE 54 PARTS OF AN ACID OF PHOSPHORUS AND 54 PARTS OF FERROUS SULFATE, ADDING MORE TOLUENE THERETO AND REFLUXING THE MIXTURE UNTIL THE TEMPERTURE INCREASES TO FROM 135* C. TO 140 C., AND THEREAFTER SEPARATING AND PURIFYING THE ESTER SO FORMED.
Claim 2
Dependent Claim
102 words
THE PROCESS OF PREPARING ESTERS FROM ADIPIC ACID AND BUTOXYETHANOL WHICH CONTAINS SMALL AMOUNTS OF A COLOR PRODUCING PEROXIDE WHICH COMPRISES MIXING ABOUT 6,838 PARTS OF BUTOXYETHANOL WITH ABOUT 1,441 PARTS OF TOLUENE, HEATING THE SAME TO FROM 90* C. TO 95* C., ADDING ABOUT 4,000 PARTS OF ADIPIC ACID TO THE MIXTURE, CONTINUING THE HEATING AND ADDING TO THE MIXTURE 54 PARTS OF AN ACID OF PHOSPHORUS AND 54 PARTS OF FERROUS SULFATE, ADDING MORE TOLUENE THERETO AND REFLUXING THE MIXTURE UNTIL THE TEMPERTURE INCREASES TO FROM 135* C. TO 140 C., AND THEREAFTER SEPARATING AND PURIFYING THE ESTER SO FORMED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |