US2722285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter assembly for suction cleaners
Assignee: Hoover Co
•
Filing: 1953-08-20
•
Granted: 1955-11-01
•
Expires: 1973-08-20
Abstract
No abstract record available.
Inventors
- 👤 George A Brace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:27
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1698087A
Cited
US1805174A
Cited
US1861402A
Cited
US2159116A
Cited
US2594281A
Cited
US2577863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |