Patent US2828183A successfully refreshed from Google Patents.
US2828183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sodium perborate
Assignee: EIDP Inc
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Filing: 1954-12-21
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Granted: 1958-03-25
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Expires: 1974-12-21
Abstract
No abstract record available.
Inventors
- 👤 David F Altimier
- 👤 Klabunde Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:23
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF PRODUCING SODIUM PERBORATE TETRAHYDRATE COMPRISING REACTING HYDROGEN PEROXIDE AND SODIUM METABORATE IN AN AQUEOUS SLURRY OF SODIUM PERBORATE TETRAHYDRATE WHILE AVOIDING THE PRESENCE OF FREE HYDRO GEN PEROXIDE IN THE LIQUID PHASE OF SAID SLURRY AND WHILE MAINTAINING IN SAID LIQUID PHASE A FREE BORAX CONCENTRATION OF AT LEAST 8 GRAMS PER LITER, AND CRYSTALLIZING SODIUM PERBORATE TETRAHYDRATE FROM SAID LIQUID PHASE.
Claim 2
Independent Claim
65 words
THE METHOD OF PRODUCING SODIUM PERBORATE TETRAHYDRATE COMPRISING REACTING HYDROGEN PEROXIDE AND SODIUM METABORATE IN AN AQUEOUS SLURRY OF SODIUM PERBORATE TETRAHYDRATE WHILE AVOIDING THE PRESENCE OF FREE HYDRO GEN PEROXIDE IN THE LIQUID PHASE OF SAID SLURRY AND WHILE MAINTAINING IN SAID LIQUID PHASE A FREE BORAX CONCENTRATION OF AT LEAST 8 GRAMS PER LITER, AND CRYSTALLIZING SODIUM PERBORATE TETRAHYDRATE FROM SAID LIQUID PHASE.
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |