US3392582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-held portable device for measuring froth depths in flotation machines
Assignee: Kennecott Corp
•
Filing: 1965-10-22
•
Granted: 1968-07-16
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hans H Pick
- 👤 Jr Ralph W Crosser
- 👤 Joseph W Ribotto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:35
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; G01F23/58; B; B03; B03D; B03D1/00; B03D1/02; B03D1/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US598985A
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US2732820A
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US1173117A
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US1263451A
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US1747022A
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US1893198A
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US2457905A
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US2840034A
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US3274692A
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US3218858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |