Patent US2683884A successfully refreshed from Google Patents.
US2683884A
Expired / Lapsed
US
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Floor polisher
Assignee: Hoover Co
•
Filing: 1949-05-07
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Granted: 1954-07-20
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Expires: 1969-05-07
Abstract
No abstract record available.
Inventors
- 👤 Erhard O Kohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:02
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4038; A47L11/02; A47L11/10; A47L11/14; A47L11/16; A47L11/4063; A47L11/4069; A47L11/4075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1622166A
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US1927225A
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US1820482A
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US1854638A
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US1877951A
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US1928246A
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US2119386A
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US2258165A
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US2300138A
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US2340379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |