Patent US2740494A successfully refreshed from Google Patents.
US2740494A
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US
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Vacuum cleaners
Assignee: STRAPAVAC Corp
•
Filing: 1953-06-29
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Granted: 1956-04-03
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Expires: 1973-06-29
Abstract
No abstract record available.
Inventors
- 👤 Buda Salvatore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:44
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/14; A47L9/00; A47L9/10; A47L9/12; A47L9/122; A47L9/14; A47L9/1427; A47L9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US110976A
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FR656550A
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US1739082A
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US2008067A
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US2064587A
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US2158109A
Cited
US2276844A
Cited
US2273210A
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US2335428A
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US2439182A
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US2438133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |