US2802722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of monopersulfates
Assignee: EIDP Inc
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Filing: 1954-12-20
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Granted: 1957-08-13
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Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Stephen E Stephanou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:24
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/06; C01B15/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF PRODUCING A SOLID MONOPERSULFATE COMPRISING REACTING AT A TEMPERATURE NOT EXCEEDING ABOUT 40*C. AN AQUEOUS SOLUTION OF MONOPERSULFURIC ACID AND A COMPOUND OF THE GROUP CONSISTING OF: (1) SODIUM, POTASSIUM, CALCIUM, BARIUM, ZINC, ALUMINUM AND AMMONIUM HYDROXIDES AND (2) THE CARBONATES CORRESPONDING TO SAID HYDROXIDES, SAID SOLUTION AND SAID COMPOUND BEING EMPLOYED IN SUCH PROPORTIONS THAT THE MIXTURE RESULTING FROM THE REACTION HAS A PH NOT GREATER THAN 3, AND RECOVERING A SOLID MONOPERSULFATE FROM SAID MIXTURE WITHOUT FIRST ADDING TO SAID MIXTURE ANY MATERIAL WHICH WILL CAUSE THE PH OF THE MIXTURE TO EXCEED 3.
Claim 2
Independent Claim
99 words
A METHOD OF PRODUCING A SOLID MONOPERSULFATE COMPRISING REACTING AT A TEMPERATURE NOT EXCEEDING ABOUT 40*C. AN AQUEOUS SOLUTION OF MONOPERSULFURIC ACID AND A COMPOUND OF THE GROUP CONSISTING OF: (1) SODIUM, POTASSIUM, CALCIUM, BARIUM, ZINC, ALUMINUM AND AMMONIUM HYDROXIDES AND (2) THE CARBONATES CORRESPONDING TO SAID HYDROXIDES, SAID SOLUTION AND SAID COMPOUND BEING EMPLOYED IN SUCH PROPORTIONS THAT THE MIXTURE RESULTING FROM THE REACTION HAS A PH NOT GREATER THAN 3, AND RECOVERING A SOLID MONOPERSULFATE FROM SAID MIXTURE WITHOUT FIRST ADDING TO SAID MIXTURE ANY MATERIAL WHICH WILL CAUSE THE PH OF THE MIXTURE TO EXCEED 3.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |