US2646882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation machine
Assignee: Individual
•
Filing: 1950-08-02
•
Granted: 1953-07-28
•
Expires: 1970-08-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Hildreth Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:35
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US247629A
Cited
US711015A
Cited
US775945A
Cited
US1480884A
Cited
US1792179A
Cited
US2221008A
Cited
US2267496A
Cited
US2330875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |