US2982614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alumina
Assignee: Kabel Es Muanyaggyar
•
Filing: 1957-10-11
•
Granted: 1961-05-02
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Expires: 1977-10-11
Abstract
No abstract record available.
Inventors
- 👤 Csordas Istvan
- 👤 Lanyi Bela
- 👤 Vissy Laszlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:25
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA533994A
Cited
US2449847A
Cited
US2643935A
Cited
US2780525A
Cited
US2746842A
Cited
US2799558A
Cited
US2837451A
Cited
US2820693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |