Patent US2520401A successfully refreshed from Google Patents.
US2520401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of thiosulfenamides
Assignee: Phillips Petroleum Co
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Filing: 1949-05-12
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Granted: 1950-08-29
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Expires: 1969-05-12
Abstract
No abstract record available.
Inventors
- 👤 Chester M Himel
- 👤 Lee O Edmonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:57
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE PROCESS OF SYNTHESIZING A THIOSULFENAMIDE WHICH COMPRISES CONTACTING A TERTIARY ALKYL THIOSULFENYL HALIDE IN N INERT ORGANIC SOLVENT THAT FORMS A SEPARATE PHASE IN THE REACTION MIXTURE WITH AN AMINE SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES IN THE PRESENCE OF AN AQUEOUS SOLUTION OF AN ALKALINE MATERIAL IN AN INTIMATE ADMIXTURE OF SOLVENT PHASE AND AQUEOUS PHASE AND THEREBY EFFECTING REACTION BETWEEN SAID THIOSULFENYL HALIDE AND SAID AMINE TO FORM A THIOSULFENAMIDE.
Claim 2
Dependent Claim
77 words
THE PROCESS OF SYNTHESIZING A THIOSULFENAMIDE WHICH COMPRISES CONTACTING A TERTIARY ALKYL THIOSULFENYL HALIDE IN N INERT ORGANIC SOLVENT THAT FORMS A SEPARATE PHASE IN THE REACTION MIXTURE WITH AN AMINE SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY AMINES IN THE PRESENCE OF AN AQUEOUS SOLUTION OF AN ALKALINE MATERIAL IN AN INTIMATE ADMIXTURE OF SOLVENT PHASE AND AQUEOUS PHASE AND THEREBY EFFECTING REACTION BETWEEN SAID THIOSULFENYL HALIDE AND SAID AMINE TO FORM A THIOSULFENAMIDE.
References Cited (Backward Citations)
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US2123082A
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US2271834A
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US2476655A
Cited
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Cited
US2417954A
Cited
US2439734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |