US2576899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partial esters of polybasic sulfide carboxylic acids and process for making same
Assignee: BASF Schweiz AG
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Filing: 1949-03-25
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Granted: 1951-11-27
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Expires: 1969-03-25
Abstract
No abstract record available.
Inventors
- 👤 Albrecht Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
C; C07; C07C; C07C323/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE MANUFACTURE OF A NEW PARTIAL ESTER OF A POLYBASIC SXULFIDE CARBOXYLIC ACID, WHICH COMPRISES HEATING SUBSTANTIALLY MOLECULAR PROPORTIONS OF A LOWER ALIPHATIC MERCAPTO-CARBOXYLIC ACID WHICH CONTAINS 2 TO 4 CARBON ATOMS AND OF A DIESTER OF MALEIC ACID WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF A HYDROXYALKYLAMIDE OF A FATTY ACID CONTAINING 12 TO 18 CARBON ATOMS AND AN ALIPHATIC ALCOHOL CONTAINING 6-18 CARBON ATOMS, WHILE EXCLUDING OXYGEN, TO A TEMPERATURE OF 50-100* C. UNTIL THE REACTION PRODUCT, AFTER NEUTRALIZATION WITH AN ALKALI HYDROXIDE, IS SOLUBLE IN WATER.
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE MANUFACTURE OF A NEW PARTIAL ESTER OF A POLYBASIC SXULFIDE CARBOXYLIC ACID, WHICH COMPRISES HEATING SUBSTANTIALLY MOLECULAR PROPORTIONS OF A LOWER ALIPHATIC MERCAPTO-CARBOXYLIC ACID WHICH CONTAINS 2 TO 4 CARBON ATOMS AND OF A DIESTER OF MALEIC ACID WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF A HYDROXYALKYLAMIDE OF A FATTY ACID CONTAINING 12 TO 18 CARBON ATOMS AND AN ALIPHATIC ALCOHOL CONTAINING 6-18 CARBON ATOMS, WHILE EXCLUDING OXYGEN, TO A TEMPERATURE OF 50-100* C. UNTIL THE REACTION PRODUCT, AFTER NEUTRALIZATION WITH AN ALKALI HYDROXIDE, IS SOLUBLE IN WATER.
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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |