Patent US5234466A successfully refreshed from Google Patents.
US5234466A
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Lowering of the pH of textile processing solutions by adding urea sulfate as a pH adjusting agent
Assignee: Peach State Labs Inc
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Filing: 1992-07-24
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Granted: 1993-08-10
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Expires: 2012-07-24
Abstract
Abstract A method for the adjustment of pH in textile processing solutions that includes the use of urea sulfate or other strong acid in the presence of a weak base.
Inventors
- 👤 R. Richard Sargent
- 👤 Jeffrey R. Alender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:07
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/02; D21H21/04; C; C02; C02F; C02F1/00; C02F1/66; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M13/00; D06M13/322; D06M13/402; D06M13/432; D06P; D06P1/00; D06P1/44; D06P1/62; D06P1/628; D06P1/64; D06P1/642; D06P1/649; D06P1/6491; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241; D21C; D21C9/00; D21C9/008; C02F2103/00; C02F2103/26; C02F2103/28; C02F2103/42; C02F5/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
A method for treating textiles comprising the steps of: a) providing a textile processing solution; b) lowering the pH of the processing solution by adding urea sulfate as a pH lowering agent; and c) contacting a textile with the pH lowered textile processing solution.
Claim 2
Independent Claim
44 words
A method for treating textiles comprising the steps of: a) providing a textile processing solution; b) lowering the pH of the processing solution by adding urea sulfate as a pH lowering agent; and c) contacting a textile with the pH lowered textile processing solution.
Claim 3
Dependent Claim
34 words
The method of claim 1, wherein the urea sulfate is formed from a molar ratio of urea to sulfuric acid of between 2.5 and 0.25 moles of urea to 1 mole of sulfuric acid.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein the urea sulfate is formed from an approximate 1:1 molar ratio of urea to sulfuric acid.
Claim 5
Dependent Claim
15 words
The method of claim 1, wherein the textile processing solution is used to treat nylon
Claim 6
Dependent Claim
13 words
The method of claim 1, wherein the textile processing solution is a dyebath.
Claim 7
Dependent Claim
13 words
The method of claim 1, wherein the textile processing solution is finishing solution.
Claim 8
Dependent Claim
15 words
The method of claim 1, wherein the textile processing solution contains a stain blocking agent.
Claim 9
Dependent Claim
26 words
The method of claim 1, wherein the urea sulfate is formed from a ratio of between approximately 1:4 and 4:1 moles of urea to sulfuric acid.
References Cited (Backward Citations)
US3988108A
Cited
US4285690A
Cited
US4300898A
Cited
US4345063A
Cited
US4402852A
Cited
US4404116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |