Patent US3379499A successfully refreshed from Google Patents.
US3379499A
Expired / Lapsed
US
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Production of attrition resistant alumina particles
Assignee: Universal Oil Products Co
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Filing: 1963-12-19
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Granted: 1968-04-23
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Expires: 1983-12-19
Abstract
No abstract record available.
Inventors
- 👤 Reno W Moehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:29
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/44; C01F7/441; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/70; B01J23/74; B01J23/755; C01F7/34; B01J37/00; B01J37/0009; B01J37/0027; B01J37/0045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |