US2693279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement relating to magnetic floor sweepers
Assignee: Electromagnets Ltd
•
Filing: 1951-04-21
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Granted: 1954-11-02
•
Expires: 1971-04-21
Abstract
No abstract record available.
Inventors
- 👤 Box William Edward
- 👤 Claridge John Thomas
- 👤 Turnock Arthur George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:50
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/40; A47L13/41; B; B03; B03C; B03C1/00; B03C1/02; B03C1/025; B03C1/031; B03C1/033; B03C1/0332; B03C1/10; B03C1/14; B03C1/30; E; E01; E01H; E01H1/00; E01H1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US148517A
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US1326561A
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US1425235A
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US1630987A
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US2455319A
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US2426795A
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US2502096A
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US2564515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |