Patent US3020577A successfully refreshed from Google Patents.
US3020577A
Expired / Lapsed
US
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Suction cleaners
Assignee: Hoover Co
•
Filing: 1960-06-29
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Granted: 1962-02-13
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Expires: 1980-06-29
Abstract
No abstract record available.
Inventors
- 👤 George F Carabet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:18
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/0009; A47L9/0018; A47L9/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB337319A
Cited
US2049603A
Cited
US2603816A
Cited
US2731103A
Cited
US2935760A
Cited
US2850756A
Cited
GB806084A
Cited
US2876479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |