Patent US2684128A successfully refreshed from Google Patents.
US2684128A
Expired / Lapsed
US
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Suction cleaner filter assembly
Assignee: Hoover Co
•
Filing: 1951-11-02
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Granted: 1954-07-20
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Expires: 1971-11-02
Abstract
No abstract record available.
Inventors
- 👤 George A Brace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:20
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1427
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US589216A
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US1553076A
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US1774589A
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US1832846A
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US1952014A
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US1949052A
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US2221746A
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US2159116A
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US2295981A
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US2599520A
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US2637410A
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 |