Patent US4362706A successfully refreshed from Google Patents.
US4362706A
Expired / Lapsed
US
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Stabilizer system for commercial hydrogen peroxide
Assignee: FMC Corp
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Filing: 1981-11-20
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Granted: 1982-12-07
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Expires: 2001-11-20
Abstract
Abstract Stabilizer formulations have been developed for commercial hydrogen peroxide stored in stainless steel containers. These stabilizers, which include benzene phosphonous acid, 2,2'-dithiobenzoic acid, 1-allyl-thiourea, and thiocarbanilide are effective in the presence of typical decomposition catalysts when used in conjunction with typical organic phosphonic stabilizer systems, even when the commercial organic phosphonic stabilizers are present in less than the usually recommended quantities.
Inventors
- 👤 Paul E. Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:03
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
A composition comprising an aqueous hydrogen peroxide solution and a stabilizing amount of an organic phosphonic acid and a stabilizing amount of a compound selected from the group consisting of benzene phosphonous acid, 2,2'-dithiobenzoic acid, 1-allyl-2-thiourea, thiocarbanilide, and salts thereof.
Claim 2
Dependent Claim
40 words
A composition comprising an aqueous hydrogen peroxide solution and a stabilizing amount of an organic phosphonic acid and a stabilizing amount of a compound selected from the group consisting of benzene phosphonous acid, 2,2'-dithiobenzoic acid, 1-allyl-2-thiourea, thiocarbanilide, and salts thereof.
Claim 3
Dependent Claim
24 words
The composition of claim 1 further comprising a stabilizing amount of a soluble stannate salt and nitrilo tri(methylenephosphonic acid) as the organic phosphonic acid.
Claim 4
Dependent Claim
15 words
The composition of claim 1 further comprising ethylenediamine tetra(methylenephosphonic acid) as the organic phosphonic acid.
Claim 5
Dependent Claim
25 words
The composition of claim 1, 2, or 3 in which the stabilizing compound is present in the amount of 0.05% by weight of hydrogen peroxide.
Claim 6
Dependent Claim
62 words
The composition of claim 2 in which the stabilizing compound is present in the amount of 0.05% by weight of the hydrogen peroxide and the stannate salt is present in the amount of 0.006% to 0.035% by weight of the hydrogen peroxide and the nitrilo tri(methylenephosphonic acid) is present in the amount of 0.005% to 0.027% by weight of the hydrogen peroxide.
Claim 7
Dependent Claim
43 words
The composition of claim 3 in which the stabilizing compound is present in the amount of 0.05% by weight of the hydrogen peroxide, and the ethylenediamine tetra(methlenephosphonic acid) is present in the amount of 0.015% to 0.081% by weight of the hydrogen peroxide.
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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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |