US1176428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation separatory apparatus and process.
Assignee: METALS RECOVERY Co
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Filing: 1916-01-21
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Granted: 1916-03-21
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Expires: 1936-01-21
Abstract
No abstract record available.
Inventors
- 👤 John M Callow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:21
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/1443; B03D1/1456; B03D1/1462; B03D1/24; B03D1/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1919-03-21 | 1919-09-20 | 1920-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-03-21 | 1923-09-20 | 1924-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-03-21 | 1927-09-20 | 1928-03-21 | $7700.00 | Window Closed / Lapsed |