US2996543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylation of amines
Assignee: Wyeth Holdings LLC
•
Filing: 1957-12-23
•
Granted: 1961-08-15
•
Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert C Kinstler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:20
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN A PROCESS FOR THE ACYLATION OF AN AMINOARYL SULFIDE WHEREIN SAID SULFIDE IS REACTED WITH A MONONUCLEAR AROYL CHLORIDE IN A TWO-PHASE REACTION MEDIUM COMPRISING AS THE AQUEOUS PHASE MEDIUM AN AQUEOUS SOLUTION OF A MEMBER OF THE GROUP CONSISTING OF ALKALI-METAL HYDROXIDES AND ALKALINE SALTS THEREOF AND AS AN ORGANIC PHASE A SOLUTION OF THE SULFIDE IN AN ORGANIC SOLVENT, THE IMPROVEMENT WHICH COMPRISES: AFTER THE ACYLATION REACTION IS FROM ABOUT 85 TO ABOUT 90% COMPLETE ADDING TO THE REACTION MASS A SUFFICIENT AMOUNT OF CHLORIDE IONS TO PRODUCE IN THE AQUEOUS PHASE A CHLORIDE ION CONCENTRATION OF FROM AT LEAST ABOUT 1.5 MOLS PER LITER TO ABOUT THE SATURATION CONCENTRATION AND THEREAFTER DURING THE SUBSEQUENT STAGES OF THE ACYLATION REACTION MAINTAINING SAID CHLORIDE ION CONCENTRATION NOT LESS THAN ABOUT SAID 1.5 MOLS PER LITER.
Claim 2
Dependent Claim
137 words
IN A PROCESS FOR THE ACYLATION OF AN AMINOARYL SULFIDE WHEREIN SAID SULFIDE IS REACTED WITH A MONONUCLEAR AROYL CHLORIDE IN A TWO-PHASE REACTION MEDIUM COMPRISING AS THE AQUEOUS PHASE MEDIUM AN AQUEOUS SOLUTION OF A MEMBER OF THE GROUP CONSISTING OF ALKALI-METAL HYDROXIDES AND ALKALINE SALTS THEREOF AND AS AN ORGANIC PHASE A SOLUTION OF THE SULFIDE IN AN ORGANIC SOLVENT, THE IMPROVEMENT WHICH COMPRISES: AFTER THE ACYLATION REACTION IS FROM ABOUT 85 TO ABOUT 90% COMPLETE ADDING TO THE REACTION MASS A SUFFICIENT AMOUNT OF CHLORIDE IONS TO PRODUCE IN THE AQUEOUS PHASE A CHLORIDE ION CONCENTRATION OF FROM AT LEAST ABOUT 1.5 MOLS PER LITER TO ABOUT THE SATURATION CONCENTRATION AND THEREAFTER DURING THE SUBSEQUENT STAGES OF THE ACYLATION REACTION MAINTAINING SAID CHLORIDE ION CONCENTRATION NOT LESS THAN ABOUT SAID 1.5 MOLS PER LITER.
References Cited (Backward Citations)
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US1857555A
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US2073100A
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US2137279A
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US2538764A
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US2643965A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |