Patent US2867505A successfully refreshed from Google Patents.
US2867505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alumina
Assignee: Universal Oil Products Co
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Filing: 1955-11-21
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Granted: 1959-01-06
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Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:53
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428; C01P; C01P2004/00; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR PRODUCING SUBSTANTIALLY PURE ALUMINA WHICH COMPRISES REACTING WATER WITH METALLIC ALUMINUM OF AT LEAST 99.5% PURITY IN THE FORM OF SUBDIVIDED SOLID PARTICLES AT A TEMPERATURE OF AT LEAST 250* F. BUT BELOW 482* F. AT A SUFFICIENT PRESSURE TO MAINTAIN A LIQUID PHASE OF WATER.
Claim 2
Dependent Claim
49 words
A PROCESS FOR PRODUCING SUBSTANTIALLY PURE ALUMINA WHICH COMPRISES REACTING WATER WITH METALLIC ALUMINUM OF AT LEAST 99.5% PURITY IN THE FORM OF SUBDIVIDED SOLID PARTICLES AT A TEMPERATURE OF AT LEAST 250* F. BUT BELOW 482* F. AT A SUFFICIENT PRESSURE TO MAINTAIN A LIQUID PHASE OF WATER.
References Cited (Backward Citations)
US2758011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |