Patent US2638404A successfully refreshed from Google Patents.
US2638404A
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Method of dyeing nitrogenous fibers with metallized azo dyes
Assignee: Wyeth Holdings LLC
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Filing: 1951-02-10
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Granted: 1953-05-12
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Expires: 1971-02-10
Abstract
No abstract record available.
Inventors
- 👤 Millson Henry Edmond
- 👤 Mooradian Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:29
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/607; D06P1/6076; D06P3/00; D06P3/02; D06P3/04; D06P3/046; Y; Y10; Y10S; Y10S8/00; Y10S8/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF DYEING NITROGENOUS FIBERS WITH METALLIZED AZO DYES SOLUBLE IN ACID BATHS, WHICH COMPRISES SUBJECTING THE MATERIAL TO BE DYED TO A DYE BATH CONTAINING METALLIZED DYE; FORMIC ACID; AND AN AMOUNT SUFFICIENT TO BE EFFECTIVE BUT INSUFFICIENT TO CAUSE SCRUM FORMATION AND EXCESSIVE PRECIPITATION IN THE BATH, OF A 2-ALKY GUANAMINE; SAID ALKYL GROUP BEING AN ALIPHATIC HYDROCARBON CHAIN OF 7 TO 17 CARBON ATOMS AND SAID 2-ALKYL GUANAMINE HAVING POLYALKYLENE OXIDE CHAINS ATTACHED TO THE AMINO NITROGENS, SAID POLYALKYLENE OXIDE CHAINS CONTAINING AT LEAST 11 BUT NOT MORE THAN 100 ETHER OXYGEN ATOMS SEPARATED BY AT LEAST 2 BUT NOT MORE THAN 3 CARBON ATOMS; AND SAID DYE BATH BEING FURTHER CHARACTERIZED BY THE ABSENCE OF MINERAL ACIDS.
Claim 2
Independent Claim
122 words
A METHOD OF DYEING NITROGENOUS FIBERS WITH METALLIZED AZO DYES SOLUBLE IN ACID BATHS, WHICH COMPRISES SUBJECTING THE MATERIAL TO BE DYED TO A DYE BATH CONTAINING METALLIZED DYE; FORMIC ACID; AND AN AMOUNT SUFFICIENT TO BE EFFECTIVE BUT INSUFFICIENT TO CAUSE SCRUM FORMATION AND EXCESSIVE PRECIPITATION IN THE BATH, OF A 2-ALKY GUANAMINE; SAID ALKYL GROUP BEING AN ALIPHATIC HYDROCARBON CHAIN OF 7 TO 17 CARBON ATOMS AND SAID 2-ALKYL GUANAMINE HAVING POLYALKYLENE OXIDE CHAINS ATTACHED TO THE AMINO NITROGENS, SAID POLYALKYLENE OXIDE CHAINS CONTAINING AT LEAST 11 BUT NOT MORE THAN 100 ETHER OXYGEN ATOMS SEPARATED BY AT LEAST 2 BUT NOT MORE THAN 3 CARBON ATOMS; AND SAID DYE BATH BEING FURTHER CHARACTERIZED BY THE ABSENCE OF MINERAL ACIDS.
References Cited (Backward Citations)
US2040796A
Cited
US2470080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |