US2533660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of calcium peroxide
Assignee: EIDP Inc
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Filing: 1950-03-31
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Granted: 1950-12-12
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Expires: 1970-03-31
Abstract
No abstract record available.
Inventors
- 👤 James H Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/04; C01B15/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD FOR PRODUCING CALCIUM PEROXIDE COMPRISING ADDING SEPARATELY (A) A SOLUABLE CALCIUM SALT AND (B) A MATERIAL FROM THE GROUP CONSISTING OF ALKALI METAL PEROXIDES AND ALKALI METAL HYDROXIDES, TO A COLD AGITATED AQUEOUS REACTION MEDIUM AT SUCH RATES AND IN SUCH RELATIVE PROPORTIONS AS WILL MAINTAIN THE PH OF SAID MEDIUM WITHIN THE RANGE 9.5 TO 11, SAID MEDIUM CONTAINING SEED CRYSTALS OF CALCIUM PEROXIDE HYDRATE AND ALSO FREE HYDROGEN PEROXIDE IN A CONCENTRATION OF AT LEAST 0.1 GRAM H2O2 PER LITER DURING THE COURSE OF THE REACTION, SEPARATING THE RESULTING CALCIUM PEROXIDE HYDRATE AND DRYING IT.
Claim 2
Independent Claim
99 words
A METHOD FOR PRODUCING CALCIUM PEROXIDE COMPRISING ADDING SEPARATELY (A) A SOLUABLE CALCIUM SALT AND (B) A MATERIAL FROM THE GROUP CONSISTING OF ALKALI METAL PEROXIDES AND ALKALI METAL HYDROXIDES, TO A COLD AGITATED AQUEOUS REACTION MEDIUM AT SUCH RATES AND IN SUCH RELATIVE PROPORTIONS AS WILL MAINTAIN THE PH OF SAID MEDIUM WITHIN THE RANGE 9.5 TO 11, SAID MEDIUM CONTAINING SEED CRYSTALS OF CALCIUM PEROXIDE HYDRATE AND ALSO FREE HYDROGEN PEROXIDE IN A CONCENTRATION OF AT LEAST 0.1 GRAM H2O2 PER LITER DURING THE COURSE OF THE REACTION, SEPARATING THE RESULTING CALCIUM PEROXIDE HYDRATE AND DRYING IT.
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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |