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US4133869A
Expired / Lapsed
US
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Hydrogen peroxide stabilization
Assignee: Shell USA Inc
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Filing: 1977-10-31
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Granted: 1979-01-09
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Expires: 1997-10-31
Abstract
Abstract Aqueous hydrogen peroxide solutions are stabilized against decomposition due to transition metal impurities by adding at least about 0.001 milliliters of acetonitrile per milliliter of total solution.
Inventors
- 👤 Leo Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:48
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
46 words
A method of stabilizing an aqueous hydrogen peroxide solution against decomposition caused by transition metals, said solution having up to about thirty percent by weight of hydrogen peroxide, which comprises adding to the solution more than about 0.001 milliliters of acetonitrile per milliliter of total solution.
Claim 2
Independent Claim
46 words
A method of stabilizing an aqueous hydrogen peroxide solution against decomposition caused by transition metals, said solution having up to about thirty percent by weight of hydrogen peroxide, which comprises adding to the solution more than about 0.001 milliliters of acetonitrile per milliliter of total solution.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the acetonitrile is more than about 0.01 milliliters of acetonitrile per milliliter of total solution.
Claim 4
Dependent Claim
31 words
A composition comprising an aqueous hydrogen peroxide solution containing up to about thirty percent by weight of hydrogen peroxide and more than 0.001 milliliters of acetonitrile per milliliter of total solution.
Claim 5
Dependent Claim
31 words
A composition comprising an aqueous hydrogen peroxide solution containing up to about thirty percent by weight of hydrogen peroxide and more than 0.001 milliliters of acetonitrile per milliliter of total solution.
Claim 6
Dependent Claim
19 words
The composition of claim 3 wherein said acetonitrile is more than about 0.01 milliliters per milliliter of total solution.
References Cited (Backward Citations)
US4007256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |