US4236891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for textile bleaching with dibasic magnesium hypochlorite
Assignee: Olin Corp
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Filing: 1979-02-05
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Granted: 1980-12-02
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Expires: 1999-02-05
Abstract
Abstract Textile fabrics are bleached in a process which comprises contacting the textiles with an aqueous solution of dibasic magnesium hypoclorite. The bleaching solution is maintained at a pH of from about 3 to about 8 by the addition of an acid or acid salt.
Inventors
- 👤 Michael Scardera
- 👤 Garrett B. Schifilliti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:00
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/3953; D; D06; D06L; D06L4/00; D06L4/20; D06L4/22; D06L4/23
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
A process for bleaching textiles which comprises contacting said textiles with an aqueous solution of dibasic magnesium hypochlorite, the pH of said aqueous solution being maintained at from about 3.5 to about 7.5 by the addition of an acid compound.
Claim 2
Dependent Claim
40 words
A process for bleaching textiles which comprises contacting said textiles with an aqueous solution of dibasic magnesium hypochlorite, the pH of said aqueous solution being maintained at from about 3.5 to about 7.5 by the addition of an acid compound.
Claim 3
Dependent Claim
31 words
The process of claim 1 in which said acid compound is an inorganic acid selected from the group consisting of phosphoric acid, hydrochloric acid, sulfuric acid, nitric acid, and boric acid.
Claim 4
Dependent Claim
31 words
The process of claim 1 in which said acid compound is an organic acid selected from the group consisting of formic acid, acetic acid, citric acid, tartaric acid, and nitrilotriacetic acid.
Claim 5
Dependent Claim
27 words
The process of claim 1 in which said acid compound is a salt selected from the group consisting of alkali metal bisulfates and alkali metal acid phosphates.
Claim 6
Dependent Claim
13 words
The process of claim 2 in which said inorganic acid is phosphoric acid.
Claim 7
Dependent Claim
23 words
The process of claim 1 in which the temperature of said aqueous solution is maintained at from about 10° to about 100° C.
Claim 8
Dependent Claim
12 words
The process of claim 6 in which said textiles are cotton textiles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |