Patent US3809746A successfully refreshed from Google Patents.
US3809746A
Expired / Lapsed
US
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Process for producing potassium superoxide
Assignee: FIRE RES INST FIRE DEFENCE AGE
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Filing: 1972-02-11
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Granted: 1974-05-07
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Expires: 1992-02-11
Abstract
Abstract POTASSIUM HYDROXIDE AND A CONCENTRATED AQUEOUS HYDROGEN PEROXIDE SOLUTION ARE MIXED UNDER HIGH VACUUM THE COMPOUNDS FORMING POTASSIUM PEROXIDE-HYDROGEN PEROXIDE K2O2/2H2O2 WHICH IS HEAT-DRIED AND THEN DEHYDRATED AT AN ELEVATED TEMPERATURE TO FORM POTASSIUM SUPEROXIDE KO2.
Inventors
- 👤 S Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/04; C01B15/043; C01B15/0435
Claims Analysis
Total Claims: 0
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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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |