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US4118182A
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Solutions of azo dyes derived from 4-4-diamino-2,2-stilbenedisulfonic acid
Assignee: EIDP Inc
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Filing: 1977-08-24
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Granted: 1978-10-03
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Expires: 1997-08-24
Abstract
Abstract Aqueous dye solution, useful for dyeing cellulosic and leather substrates, consisting essentially of, by weight: (i) 10% to 25% of at least one dye selected from the group ##STR1## wherein M is a water-solubilizing cation; (II) 5% TO 20% OF UREA; AND (iii) 55% to 85% of water.
Inventors
- 👤 Sanford Byrom Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:18
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0072; C09B67/0073; C09B35/00; C09B35/02; C09B35/039; C09B35/205; C09B35/215; C09B35/38; C09B35/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
45 words
The aqueous dye solution consisting essentially of the following components by weight: (i) 10% to 25% of at least one dye selected from the group ##STR6## wherein M is a water-solubilizing cation; (ii) 5% to 20% of urea; and (iii) 55% to 85% of water.
Claim 2
Dependent Claim
45 words
The aqueous dye solution consisting essentially of the following components by weight: (i) 10% to 25% of at least one dye selected from the group ##STR6## wherein M is a water-solubilizing cation; (ii) 5% to 20% of urea; and (iii) 55% to 85% of water.
Claim 3
Dependent Claim
32 words
The aqueous dye solution of claim 1 wherein M is selected from the group consisting of lithium cation, and lithium cation plus a cation selected from triethanolammonium, diethanolammonium, diisopropanolammonium, and triisopropanolammonium cations.
Claim 4
Dependent Claim
13 words
The aqueous dye solution of claim 2 wherein M is the lithium cation.
Claim 5
Dependent Claim
12 words
The aqueous dye solution of claim 2 wherein the dye is ##STR7##
Claim 6
Dependent Claim
12 words
The aqueous dye solution of claim 2 wherein the dye is ##STR8##
Claim 7
Dependent Claim
12 words
The aqueous dye solution of claim 2 wherein the dye is ##STR9##
Claim 8
Dependent Claim
12 words
The aqueous dye solution of claim 2 wherein the dye is ##STR10##
Claim 9
Dependent Claim
12 words
The aqueous dye solution of claim 2 wherein the dye is ##STR11##
Claim 10
Dependent Claim
12 words
The aqueous dye solution of claim 2 wherein the dye is ##STR12##
Claim 11
Dependent Claim
12 words
The aqueous dye solution of claim 3 wherein the dye is ##STR13##
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) | 1981-10-02 | 1982-04-03 | 1982-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-02 | 1986-04-03 | 1986-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-02 | 1990-04-03 | 1990-10-03 | $7700.00 | Window Closed / Lapsed |