Patent US2864462A successfully refreshed from Google Patents.
US2864462A
Expired / Lapsed
US
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Disposable filter bag for suction cleaners
Assignee: Hoover Co
•
Filing: 1954-05-07
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Granted: 1958-12-16
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Expires: 1974-05-07
Abstract
No abstract record available.
Inventors
- 👤 George A Brace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:25
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1427; A47L9/1436; A47L9/1445; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/362; A47L9/1481
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US808170A
Cited
GB190827162A
Cited
US2070674A
Cited
US2590235A
Cited
US2577863A
Cited
US2618411A
Cited
US2549373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |