Patent US2879528A successfully refreshed from Google Patents.
US2879528A
Expired / Lapsed
US
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Floor working machine
Assignee: Individual
•
Filing: 1953-04-23
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Granted: 1959-03-31
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Expires: 1973-04-23
Abstract
No abstract record available.
Inventors
- 👤 Walter S Finnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:01
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; 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)
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US979798A
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US1520769A
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US1773992A
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US1519616A
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US1736446A
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US1689166A
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US1763365A
Cited
US1918519A
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US2142697A
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US2600233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |