US3468625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of crystalline alumina by homogeneous precipitation
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1966-11-18
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Granted: 1969-09-23
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Expires: 1986-11-18
Abstract
No abstract record available.
Inventors
- 👤 E Richard Nightingale Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:28
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01F7/36; C01P; C01P2006/00; C01P2006/12; C01P2006/14; C01P2006/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2371237A
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US1030747A
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US2289286A
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US2595415A
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US2595416A
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GB806199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |