Patent US2657408A successfully refreshed from Google Patents.
US2657408A
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Power propelled sweeper
Assignee: Individual
•
Filing: 1949-12-17
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Granted: 1953-11-03
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Expires: 1969-12-17
Abstract
No abstract record available.
Inventors
- 👤 Fred J Machovec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:49
CPC Classifications
E; E01; E01H; E01H1/00; E01H1/02; E01H1/04; E01H1/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB190911198A
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US1610444A
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US1407180A
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US1511040A
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US2151659A
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US2205249A
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US2286245A
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US2283229A
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US2298054A
Cited
US2525090A
Cited
US2505576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |