US2996350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling manganese ion impurities in permonosulfate bleaching
Assignee: EIDP Inc
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Filing: 1959-07-28
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Granted: 1961-08-15
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Expires: 1979-07-28
Abstract
No abstract record available.
Inventors
- 👤 Gerald L Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:39
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN THE METHOD OF BLEACHING WITH AN ALKALI METAL PERMONOSULFATE IN SOLUTION IN WATER CONTAINING MANGANESE IONS AS AN IMPURITY, THE IMPROVEMENT CONSISTING ESSENTIALLY OF INCORPORATING INTO SAID SOLUTION A SUFFICIENT AMOUNT OF A CRYSTALLINE SALT PERHYDRATE COMPOUND WHICH LIBERATES HYDROGEN PEROXIDE IN WATER TO REDUCE SAID MANGANESE IONS TO A COLORLESS STATE, THE RATIO OF ACTIVE OXYGEN CONTENT OF SAID PERMONOSULFATE TO SAID PERHYDRATE BEING ABOUT 3:1 TO 30:1.
Claim 2
Dependent Claim
70 words
IN THE METHOD OF BLEACHING WITH AN ALKALI METAL PERMONOSULFATE IN SOLUTION IN WATER CONTAINING MANGANESE IONS AS AN IMPURITY, THE IMPROVEMENT CONSISTING ESSENTIALLY OF INCORPORATING INTO SAID SOLUTION A SUFFICIENT AMOUNT OF A CRYSTALLINE SALT PERHYDRATE COMPOUND WHICH LIBERATES HYDROGEN PEROXIDE IN WATER TO REDUCE SAID MANGANESE IONS TO A COLORLESS STATE, THE RATIO OF ACTIVE OXYGEN CONTENT OF SAID PERMONOSULFATE TO SAID PERHYDRATE BEING ABOUT 3:1 TO 30:1.
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |