Patent US2840556A successfully refreshed from Google Patents.
US2840556A
Expired / Lapsed
US
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Preparation of sulfenmorpholides
Assignee: Wyeth Holdings LLC
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Filing: 1955-11-30
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Granted: 1958-06-24
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Expires: 1975-11-30
Abstract
No abstract record available.
Inventors
- 👤 Kinstler Robert Chalk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:36
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/76; C07D277/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN THE PREPARATION OF SULFENMORPHOLIDES WHICH COMPRISES REACTING N-CHLOROMORPHOLINE DIRECTLY WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF FREE MERCAPTANS AND DISULFIDES IN AN ANHYDROUS, INERT, VOLATILE OR GANIC SOLVENT CONTAINING SUFFICIENT FREE MORPHOLINE TO FIX BY-PRODUCT HYDROGEN CHLORIDE AS MORPHOLINE HYDROCHLORIDE, AND RECOVERING THE SULFENMORPHOLIDE FROM THE REACTION LIQUOR, THE IMPROVEMENT IN COMBINATION THEREWITH OF LIBERATING MORPHOLINE FROM THE MORPHOLINE HYDROCHLORIDE WHICH COMPRISES: SLURRYING THE MORPHOLINE HYDROCHLORIDE IN AN INERT ORGANIC SOLVENT AND SATURATING THE SLURRY WITH ANHDROUS AMMONIA.
Claim 2
Dependent Claim
81 words
IN THE PREPARATION OF SULFENMORPHOLIDES WHICH COMPRISES REACTING N-CHLOROMORPHOLINE DIRECTLY WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF FREE MERCAPTANS AND DISULFIDES IN AN ANHYDROUS, INERT, VOLATILE OR GANIC SOLVENT CONTAINING SUFFICIENT FREE MORPHOLINE TO FIX BY-PRODUCT HYDROGEN CHLORIDE AS MORPHOLINE HYDROCHLORIDE, AND RECOVERING THE SULFENMORPHOLIDE FROM THE REACTION LIQUOR, THE IMPROVEMENT IN COMBINATION THEREWITH OF LIBERATING MORPHOLINE FROM THE MORPHOLINE HYDROCHLORIDE WHICH COMPRISES: SLURRYING THE MORPHOLINE HYDROCHLORIDE IN AN INERT ORGANIC SOLVENT AND SATURATING THE SLURRY WITH ANHDROUS AMMONIA.
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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |