US3561914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing natural nitrogenous fibrous material and a preparation thereof
Assignee: BASF Schweiz AG
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Filing: 1968-06-25
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Granted: 1971-02-09
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Expires: 1988-06-25
Abstract
Abstract A PROCESS FOR DYEING NATURAL NITROGENOUS FIBERS WITH WATER-SOLUBLE 1:2 METAL-COMPLEX DYESTUFFS WHEREIN DYEING IS PERFORMED AT 70 TO 85*C. IN THE PRESENCE OF (A) A WATER SOLUBLE SALT OF TETRABORIC ACID AND (B) A NITROGEN CONTAINING POLYGLYCOL DERIVATIVE OF AN ALIPHATIC COMPOUND OF HIGH MOLECULAR WEIGHT IN THE FORM OF AN ACID ESTER OF AN AT LEAST DIBASIC OXYGEN ACID OR A SALT THEREOF.
Inventors
- 👤 Heinz Abel
- 👤 Alfred Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:24
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/14; D06P3/20; D06P1/00; D06P1/44; D06P1/60; D06P1/607; D06P1/6076; D06P1/673; D06P1/67333; D06P1/67341; Y; Y10; Y10S; Y10S8/00; Y10S8/907; Y10S8/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |