US3903244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized hydrogen peroxide
Assignee: FMC Corp
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Filing: 1973-02-02
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Granted: 1975-09-02
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Expires: 1993-02-02
Abstract
Abstract A hydrogen peroxide concentrate is described containing up to 50% hydrogen peroxide, 1 to 3% of a soluble amino(methyl phosphonic acid) or a salt thereof, and 0.05 to 0.5% of phenol; the concentrate is useful in the preparation of highly acid metal pickling baths.
Inventors
- 👤 Donald Charles Winkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:35
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/066
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
34 words
AN AQUEOUS SOLUTION CONTAINING 20 TO 50% HYDROGEN PEROXIDE, 1 TP 3% OF A SOLUBLE AMINO(METHYL PHOSPHONIC ACID) IN FREE FORM OR IN THE FORM OF A SUBUBLE SALT, AND 0.05 TO 0.5% PHENOL.
Claim 2
Dependent Claim
34 words
AN AQUEOUS SOLUTION CONTAINING 20 TO 50% HYDROGEN PEROXIDE, 1 TP 3% OF A SOLUBLE AMINO(METHYL PHOSPHONIC ACID) IN FREE FORM OR IN THE FORM OF A SUBUBLE SALT, AND 0.05 TO 0.5% PHENOL.
Claim 3
Dependent Claim
39 words
The solution of claim 1, in which the peroxide concentration is 35%, the phosphonic acid is a mixture of 2.0% of amino(trimethyl phosphonic acid) and 0.5% of ethylenediamine tetra(methyl phosphonic acid) and the phenol is present in 0.2% concentration.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |