Patent US2947602A successfully refreshed from Google Patents.
US2947602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sodium perborate in stable form
Assignee: Shell USA Inc
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Filing: 1955-08-29
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Granted: 1960-08-02
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Expires: 1975-08-29
Abstract
No abstract record available.
Inventors
- 👤 Edward A Youngman
- 👤 Richard M Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:37
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR PRODUCING A SODIUM PERBORATE OF IMPROVED PROPERTIES WHICH COMPRISES INTIMATELY CONTACTING SODIUM METABORATE AND HYDROGEN PEROXIDE AS ESSENTIALLY THE SOLE REACTANTS IN AN AQUEOUS MEDIUM WHILE MAINTAINING THE MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF 40* TO 60*C. UNTIL CRYSTALLIZATION OF SODIUM PERBORATE TRIHYDRATE THEREFROM TAKES PLACE AND SEPARATING THE CRYSTALS SO PRODUCED.
Claim 2
Dependent Claim
57 words
A PROCESS FOR PRODUCING A SODIUM PERBORATE OF IMPROVED PROPERTIES WHICH COMPRISES INTIMATELY CONTACTING SODIUM METABORATE AND HYDROGEN PEROXIDE AS ESSENTIALLY THE SOLE REACTANTS IN AN AQUEOUS MEDIUM WHILE MAINTAINING THE MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF 40* TO 60*C. UNTIL CRYSTALLIZATION OF SODIUM PERBORATE TRIHYDRATE THEREFROM TAKES PLACE AND SEPARATING THE CRYSTALS SO PRODUCED.
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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |