US2875897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation machine
Assignee: Individual
•
Filing: 1953-06-22
•
Granted: 1959-03-03
•
Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Booth Lionel Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:47
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B03D1/1406; B03D1/1443; B03D1/1475; B03D1/1493; B03D1/02; B03D1/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1976956A
Cited
US2165889A
Cited
US2243309A
Cited
US2390111A
Cited
US2410429A
Cited
US2433592A
Cited
US2530814A
Cited
FR991767A
Cited
US2713477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |