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Patent US2630509A successfully refreshed from Google Patents.
US2630509A
Expired / Lapsed
US
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Handle switch for floor polishing machines and the like
Assignee: Nilfisk Inc
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Filing: 1951-09-20
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Granted: 1953-03-03
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Expires: 1971-09-20
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Arones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:43
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4002; A47L11/4008; A47L11/4075; H; H01; H01H; H01H9/00; H01H9/02; H01H9/06; H01H2009/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |