US3071427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing nitrogenous fibers and preparations for carrying out the process
Assignee: BASF Schweiz AG
•
Filing: 1959-04-23
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Granted: 1963-01-01
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Expires: 1979-04-23
Abstract
No abstract record available.
Inventors
- 👤 Buchler Arthur
- 👤 Casty Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:02
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/14; D06P3/16; Y; Y10; Y10S; Y10S8/00; Y10S8/907; Y10S8/916; Y10S8/917; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR DYEING NITROGENOUS FIBERS CAPABLE OF BEING DYED WITH ACID DYESTUFFS, WHICH COMPRISES TREATING THE FIBERS IN AN AQUEOUS MEDIUM WITH A DYESTUFF CONSISTING ESSENTIALLY OF A 1:2-METAL COMPLEX COMPOUND OF AN AZO-DYESTUFF WHICH COMPOUND IS SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT COMPOUNDS AND CONTAINS IN THE MOLECULE OF THE METAL COMPLEX AT LEAST TWO ACID GROUPS IMPARTING SOLUBILITY IN WATER, AND CARRYING OUT THE TREATMENT IN THE PRESENCE OF A COMPOUND WHICH CONTAINS AT LEAST ONE BASIC NITROGEN ATOM TO WHICH IS BOUND AT LEAST ONE RADICAL CONTAINING A POLYGLYCOL ETHER CHAIN, THE MOLECULE CONTAINING AT LEAST 3
Claim 2
Dependent Claim
104 words
A PROCESS FOR DYEING NITROGENOUS FIBERS CAPABLE OF BEING DYED WITH ACID DYESTUFFS, WHICH COMPRISES TREATING THE FIBERS IN AN AQUEOUS MEDIUM WITH A DYESTUFF CONSISTING ESSENTIALLY OF A 1:2-METAL COMPLEX COMPOUND OF AN AZO-DYESTUFF WHICH COMPOUND IS SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT COMPOUNDS AND CONTAINS IN THE MOLECULE OF THE METAL COMPLEX AT LEAST TWO ACID GROUPS IMPARTING SOLUBILITY IN WATER, AND CARRYING OUT THE TREATMENT IN THE PRESENCE OF A COMPOUND WHICH CONTAINS AT LEAST ONE BASIC NITROGEN ATOM TO WHICH IS BOUND AT LEAST ONE RADICAL CONTAINING A POLYGLYCOL ETHER CHAIN, THE MOLECULE CONTAINING AT LEAST 3
References Cited (Backward Citations)
US2933489A
Cited
US2763530A
Cited
US2857235A
Cited
US2835550A
Cited
US2983651A
Cited
US2900218A
Cited
US2967755A
Cited
US2914531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |