US2648529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation apparatus
Assignee: Individual
•
Filing: 1949-05-24
•
Granted: 1953-08-11
•
Expires: 1969-05-24
Abstract
No abstract record available.
Inventors
- 👤 Paul L Wigton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:05
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B03D1/02; B03D1/028; B03D1/1406; B03D1/1443; B03D1/1462; B03D1/1475; B03D1/24; B03D1/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US950152A
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US1268630A
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US1417883A
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US1583359A
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US1912228A
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US2187746A
Cited
US2288063A
Cited
US2390111A
Cited
US2530814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |