US4453944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye stable to dyeing, processes for producing it, and its use for dyeing and printing synthetic and semi-synthetic fibre materials
Assignee: Novartis Corp
•
Filing: 1983-03-28
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Granted: 1984-06-12
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Expires: 2003-03-28
Abstract
Abstract There is described a novel modification of the dye of the formula <IMAGE> which is characterized by the data given in claim 1. This novel modification is suitable in particular for dyeing wound packages of polyester materials under HT conditions, materials dyed in a golden-yellow shade being obtained.
Inventors
- 👤 Peter Liechti
- 👤 Antoine Clement
- 👤 Peter Eugster
- 👤 Kurt Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:46
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0025; C09B67/0028; C09B67/0001; C09B67/0014; C09B67/0015; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
A crystalline modification of the dye of the formula ##STR5## which modification is stable to dyeing and which is characterized by the X-ray diffraction pattern shown in FIG. 1 (CuK-α 1 radiation) with the characteristic reflexes, and the d values of the interplanar spacings calculated from the diffraction pattern: ______________________________________
d(Å)
15.1 8.5 7.2 6.3 5.93 5.56 4.91 4.71
I* m m s s m s m m
______________________________________
d(Å)
4.58 4.29 3.87 3.62 3.51 3.31 3.10
I* m m m m s ss m
______________________________________
I* = intensity.
Claim 2
Dependent Claim
89 words
A crystalline modification of the dye of the formula ##STR5## which modification is stable to dyeing and which is characterized by the X-ray diffraction pattern shown in FIG. 1 (CuK-α 1 radiation) with the characteristic reflexes, and the d values of the interplanar spacings calculated from the diffraction pattern: ______________________________________
d(Å)
15.1 8.5 7.2 6.3 5.93 5.56 4.91 4.71
I* m m s s m s m m
______________________________________
d(Å)
4.58 4.29 3.87 3.62 3.51 3.31 3.10
I* m m m m s ss m
______________________________________
I* = intensity.
Claim 3
Dependent Claim
83 words
A process for producing the crystalline modification of claim 1, which process comprises: (a) heating the amorphous dye in the dry state to a temperature above 140° C.; (b) heating the amorphous dye in an aqueous suspension to a temperature above 90° C.; or (c) heating the amorphous dye, in an organic solvent selected from the group consisting of lower alkanols, glycols, dioxane and glycol ethers, to a temperature of 60° C. to 20° C. below the boiling temperature of the selected solvent.
References Cited (Backward Citations)
US2007382A
Cited
CH508701A
Cited
US4074965A
Cited
US4319880A
Cited
US4327999A
Cited
US4332588A
Cited
US4374640A
Cited
US4388078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |