US2806760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing nitrogenous fibers with metalliferous monoazo dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1954-06-04
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Granted: 1957-09-17
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Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Brassel Jakob
- 👤 Buehler Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:38
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/14; C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16; D06P1/00; D06P1/02; D06P1/10; D06P1/39; D06P3/16; D06P3/24; D06P3/241; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR DYEING NITROGENOUS METERIAL WHICH OWING TO ITS NITROGEN CONTENT IS CAPABLE OF BEING DYED WITH ACID-DYESTUFFS, WHICH PROCESS COMPRISES DYEING THE METERIAL IN AN AQUEOUS WEAKLY ALKALINE TO WEAKLY ACID MEDIUM WITH A METALLIFEROUS MONOAZO DYESTUFF WHICH CONTAINS ONE ATOM OF METAL BOUND IN COMPLEX UNION TO 2-MOLECULES OF DIFFERENT MONOAZO DYESUFFS BOTH OF WHICH DYESTUFFS ARE FREE FROM CARBOXYLIC ACID GROUPS IN A POSITION OTHER THAN AN ORTHO-POSITION RELATIVELY TO THE AZO LINKAGE AND CONTAIN TOGETHER A SINGLE SULFONIC ACID GROUP.
Claim 2
Dependent Claim
85 words
A PROCESS FOR DYEING NITROGENOUS METERIAL WHICH OWING TO ITS NITROGEN CONTENT IS CAPABLE OF BEING DYED WITH ACID-DYESTUFFS, WHICH PROCESS COMPRISES DYEING THE METERIAL IN AN AQUEOUS WEAKLY ALKALINE TO WEAKLY ACID MEDIUM WITH A METALLIFEROUS MONOAZO DYESTUFF WHICH CONTAINS ONE ATOM OF METAL BOUND IN COMPLEX UNION TO 2-MOLECULES OF DIFFERENT MONOAZO DYESUFFS BOTH OF WHICH DYESTUFFS ARE FREE FROM CARBOXYLIC ACID GROUPS IN A POSITION OTHER THAN AN ORTHO-POSITION RELATIVELY TO THE AZO LINKAGE AND CONTAIN TOGETHER A SINGLE SULFONIC ACID GROUP.
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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |