Patent US2431370A successfully refreshed from Google Patents.
US2431370A
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US
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Powdered alumina
Assignee: The General Electric Company PLC
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Filing: 1944-02-03
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Granted: 1947-11-25
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Expires: 1964-02-03
Abstract
No abstract record available.
Inventors
- 👤 Chirnside Ralph Clark
- 👤 Dauncey Leonard Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:22
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/30; C01F7/32; B; B01; B01J; B01J2/00
Claims Analysis
Total Claims: 0
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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) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |