US3480389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of active alumina agglomerates of high mechanical strength
Assignee: Produits Chimiques Pechiney Saint Gobain
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Filing: 1966-07-01
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Granted: 1969-11-25
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Expires: 1986-07-01
Abstract
No abstract record available.
Inventors
- 👤 Maxime Graulier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:06
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/021; C01F7/025; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J21/16; B01J37/00; B01J37/08; B01J37/10; C01P; C01P2004/00; C01P2004/50; C01P2006/00; C01P2006/12; C01P2006/13; C01P2006/14; C01P2006/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2774744A
Cited
US3310366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |