Patent US2120485A successfully refreshed from Google Patents.
US2120485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ore flotation
Assignee: SEMMES AND SEMMES
•
Filing: 1933-12-29
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Granted: 1938-06-14
•
Expires: 1953-12-29
Abstract
No abstract record available.
Inventors
- 👤 Clemmer Julius Bruce
- 👤 O'meara Robert Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D1/002; B03D2201/00; B03D2201/02; B03D2201/04; B03D2201/06; B03D2203/00; B03D2203/02; B03D2203/04
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) | 1941-06-13 | 1941-12-13 | 1942-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-13 | 1945-12-13 | 1946-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-13 | 1949-12-13 | 1950-06-14 | $7700.00 | Window Closed / Lapsed |