US2657112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thionated indophenol products and processes
Assignee: Southern Dyestuff Corp
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Filing: 1953-02-26
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Granted: 1953-10-27
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Expires: 1973-02-26
Abstract
No abstract record available.
Inventors
- 👤 Ewen D Robinson
- 👤 David F Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:09
CPC Classifications
C; C09; C09B; C09B49/00; C09B49/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
38 words
IN THE PRODUCTION OF INDOPHENOL SULFURIZED DYESTUFFS THE STEP OF THIONATING THE INDOPHENOL DYESTUFF COMPONENTS IN THE PRESENCE OF A CHEMICAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE SODIUM SULFONATES OF TOLUENE, XYLENE, CYMENE, DIMETHYLANILINE AND TETRAHYDRONAPHTHALENE.
Claim 2
Dependent Claim
38 words
IN THE PRODUCTION OF INDOPHENOL SULFURIZED DYESTUFFS THE STEP OF THIONATING THE INDOPHENOL DYESTUFF COMPONENTS IN THE PRESENCE OF A CHEMICAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE SODIUM SULFONATES OF TOLUENE, XYLENE, CYMENE, DIMETHYLANILINE AND TETRAHYDRONAPHTHALENE.
Claim 3
Dependent Claim
67 words
A READY-TO-DYE AQUEOUS SOLUTION OF A WATER SOLUBLE, SULFURIZED, REDUCED, INDOPHENOL DYESTUFF, SUBSTANTIALLY FREE OF INSOLUBLE MATERIALS AND HAVING A DYESTUFF CONCENTRATION IN EXCESS OF 7%, AND CONTAINING A SULFIDE REDUCING AGENT AND ABOUT 3% TO 15% OF A CHEMICAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE SODIUM POTASSIUM AND AMMONIUM SULFONATES OF TOLUENE, XYLENE, CYMENE, DIMETHYLANILINE AND TETRAHYDRONAPHTHALENE AND THE COMPOUNDS HEXAMETHYLENETETRAMINE, UREA AND THIOUREA.
Claim 4
Dependent Claim
67 words
A READY-TO-DYE AQUEOUS SOLUTION OF A WATER SOLUBLE, SULFURIZED, REDUCED, INDOPHENOL DYESTUFF, SUBSTANTIALLY FREE OF INSOLUBLE MATERIALS AND HAVING A DYESTUFF CONCENTRATION IN EXCESS OF 7%, AND CONTAINING A SULFIDE REDUCING AGENT AND ABOUT 3% TO 15% OF A CHEMICAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE SODIUM POTASSIUM AND AMMONIUM SULFONATES OF TOLUENE, XYLENE, CYMENE, DIMETHYLANILINE AND TETRAHYDRONAPHTHALENE AND THE COMPOUNDS HEXAMETHYLENETETRAMINE, UREA AND THIOUREA.
References Cited (Backward Citations)
US1987583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |