US4401435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidizing medium for dyes
Assignee: Dow Chemical Co
•
Filing: 1980-04-14
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Granted: 1983-08-30
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Expires: 2000-04-14
Abstract
Abstract An acidic, aqueous oxidant including ionized bromate, iodate and a soluble vanadium-containing material.
Inventors
- 👤 Ralph A. Davis
- 👤 Randy C. Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:13
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/222
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
40 words
In a method to oxidize dyes on fibers by contacting the fiber with an acidic, aqueous solution containing a bromate and an iodate, the improvement comprising including in the solution a soluble vanadium-containing material capable of forming a vanadate ion.
Claim 2
Dependent Claim
40 words
In a method to oxidize dyes on fibers by contacting the fiber with an acidic, aqueous solution containing a bromate and an iodate, the improvement comprising including in the solution a soluble vanadium-containing material capable of forming a vanadate ion.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the vanadium-containing material is at least one member consisting of alkali metal vanadates and ammonium vanadate.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the vanadium-containing material is at least one member selected from the group consisting of sodium vanadate and potassium vanadate.
Claim 5
Independent Claim
37 words
A method to oxidize leuco sulfur or vat dyes on fibers comprising contacting said fiber with an acidic, aqueous oxidant including ionized bromate, iodate and a soluble vanadium-containing material for a sufficient time to oxidize the dye.
Claim 6
Independent Claim
37 words
A method to oxidize leuco sulfur or vat dyes on fibers comprising contacting said fiber with an acidic, aqueous oxidant including ionized bromate, iodate and a soluble vanadium-containing material for a sufficient time to oxidize the dye.
Claim 7
Dependent Claim
20 words
The method of claim 4 including maintaining the composition at a temperature of from about 20° to about 95° C.
Claim 8
Independent Claim
95 words
A method to oxidize leuco sulfur or vat dyes on fibers comprising contacting said fiber with an aqueous solution comprising water in which a sufficient amount of bromine-, iodine- and vanadium-containing materials have been mixed to provide an ion concentration in the solution of about 0.4 to about 42 grams per liter bromate ion, about 0.03 to about 12 grams per liter iodate ion, about 0.02 to about 8 grams per liter vanadate ion and a sufficient amount of a lower aliphatic acid to acidity the solution, for a sufficient time to oxidize the dye.
Claim 9
Independent Claim
95 words
A method to oxidize leuco sulfur or vat dyes on fibers comprising contacting said fiber with an aqueous solution comprising water in which a sufficient amount of bromine-, iodine- and vanadium-containing materials have been mixed to provide an ion concentration in the solution of about 0.4 to about 42 grams per liter bromate ion, about 0.03 to about 12 grams per liter iodate ion, about 0.02 to about 8 grams per liter vanadate ion and a sufficient amount of a lower aliphatic acid to acidity the solution, for a sufficient time to oxidize the dye.
Claim 10
Dependent Claim
20 words
The method of claim 6 including maintaining the composition at a temperature of from about 20° to about 95° C.
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |