US3623831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing textile material of mixtures of polyester and cellulose fibres
Assignee: Hoechst AG
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Filing: 1969-04-28
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Granted: 1971-11-30
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Expires: 1989-04-28
Abstract
Abstract TEXTILE MATERIALS CONSISTING OF MIXTURES OF POLYESTER AND CELLULOSE FIBERS ARE DYED EQUAL SHADES BY (A) IMPREGNATION WITH AN ALKALINE SOLUTION CONTAINING (1) A COUPLING COMPONENT, (2) A DIAZOAMINO OR TETRAZOAMINO COMPOUND OR AN ANTIDIAZOTATE, AND (3) WETTING OR DISPERSING AGENTS, (B) DRYING THE MATERIAL, (C) IMPREGNATION WITH AN ACID SOLUTION CONTAINING A DISPERSE DYE, (D) DRYING THE MATERIAL AND (E) SUBJECTING IT TO A HEAT TREATMENT.
Inventors
- 👤 Rudolf Lowenfeld
- 👤 Uwe Kosubek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:35
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/68; D06P3/82; D06P3/8204; D06P3/8223; D06P3/8238; D06P3/8257; Y; Y10; Y10S; Y10S8/00; Y10S8/908; Y10S8/912; Y10S8/913; Y10S8/915; Y10S8/92; Y10S8/922; Y10S8/933
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |