US2494602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation apparatus
Assignee: Individual
•
Filing: 1945-08-07
•
Granted: 1950-01-17
•
Expires: 1965-08-07
Abstract
No abstract record available.
Inventors
- 👤 Harold M Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:55
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B03D1/02; B03D1/028; B03D1/1406; B03D1/1412; B03D1/1443; B03D1/1462; B03D1/1475
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1445042A
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US1942803A
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US1963122A
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US2047643A
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US2104349A
Cited
DE674395C
Cited
GB516181A
Cited
US2316770A
Cited
US2393976A
Cited
US2390111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |