US3385663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of high surface area, waterdispersible alumina monohydrate from low surface area alumina trihydrate
Assignee: EIDP Inc
•
Filing: 1964-07-31
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Granted: 1968-05-28
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 David A Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:34
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/44; C01F7/447; C01F7/448; C01P; C01P2006/00; C01P2006/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2595416A
Cited
US2774744A
Cited
US2659660A
Cited
US2915475A
Cited
US2992262A
Cited
US3207578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |