Patent US3485487A successfully refreshed from Google Patents.
US3485487A
Expired / Lapsed
US
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Method and apparatus for beneficiating ores
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1967-01-10
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Granted: 1969-12-23
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Expires: 1987-01-10
Abstract
No abstract record available.
Inventors
- 👤 Edward L Bennett
- 👤 Raymond M Lockwood
- 👤 Henry W Wichers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:44
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; B; B03; B03C; B03C1/00; B03C1/02; B03C1/30
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) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |