US4240791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing method for fibrous products
Assignee: Adeka Corp
•
Filing: 1979-02-15
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Granted: 1980-12-23
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Expires: 1999-02-15
Abstract
Abstract According to this invention, there is provided a method of dyeing fibrous products characterized in that, in the dyeing of fibrous products using an oxidation-reduction dyeing type dye and an aqueous alkali solution of thiourea dioxide as a reducing solution, the reduction of the dye with the said aqueous alkali solution of thiourea dioxide is carried out in the presence of one or more dialdehyde compounds selected from dialdehyde compounds represented by the general formula OHC-R-CHO (I) in which R is a saturated or unsaturated aliphatic or aromatic organic compound radical.
Inventors
- 👤 Kanji Sato
- 👤 Kazuyoshi Kushibe
- 👤 Masaru Nishii
- 👤 Yasuhiro Kanaya
- 👤 Yasumasa Kawabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:25
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/221; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/65112
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
A method of dyeing fibrous products comprising dyeing a fibrous product using an oxidation-reduction dyeing type dye and an aqueous alkali solution of thiourea dioxide as a reducing solution with the reduction of the dye with said aqueous alkali solution of thiourea dioxide being carried out in the presence of one or more dialdehyde compounds selected from dialdehyde compounds represented by the general formula OHC--R--CHO (I) in which R is a saturated or unsaturated aliphatic or aromatic organic compound radical.
Claim 2
Independent Claim
80 words
A method of dyeing fibrous products comprising dyeing a fibrous product using an oxidation-reduction dyeing type dye and an aqueous alkali solution of thiourea dioxide as a reducing solution with the reduction of the dye with said aqueous alkali solution of thiourea dioxide being carried out in the presence of one or more dialdehyde compounds selected from dialdehyde compounds represented by the general formula OHC--R--CHO (I) in which R is a saturated or unsaturated aliphatic or aromatic organic compound radical.
Claim 3
Dependent Claim
33 words
Method according to claim 1, in which said reduction is carried out either with said dialdehyde compound(s) added to a reducing bath or with said dialdehyde compound(s) adsorbed beforehand onto a fibrous product.
Claim 4
Dependent Claim
36 words
Method according to claim 1, in which said dialdehyde compound(s) is used together with the dye to effect pigment pad, and thereafter reduction is carried out by steaming in an alkaline reducing bath of thiourea dioxide.
Claim 5
Dependent Claim
26 words
Method according to claim 1, in which said dialdehyde compound(s) is used in an amount ranging from 0.1 to 10 times the amount of thiourea dioxide.
References Cited (Backward Citations)
US2576846A
Cited
US3248337A
Cited
US2164930A
Cited
US2201010A
Cited
US2882280A
Cited
US3632293A
Cited
DE2011387A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |