Patent US3416888A successfully refreshed from Google Patents.
US3416888A
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US
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Method for preparing spheroidal alumina
Assignee: Snam SpA
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Filing: 1965-03-31
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Granted: 1968-12-17
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Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Notari Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:30
CPC Classifications
C; C01; C01G; C01G43/00; B; B01; B01J; B01J2/00; B01J2/02; B01J2/06; B01J2/08; B01J20/00; B01J20/02; B01J20/06; B01J20/08; B01J21/00; B01J21/02; B01J21/04; C01B; C01B32/00; C01B32/90; C01F; C01F15/00; C01G43/01; C01G43/025; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/14; C01P2006/16; C01P2006/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2417664A
Cited
US2697066A
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US2666749A
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US2865866A
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US3038784A
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US2968635A
Cited
US3033800A
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US3152865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |