Patent US2648090A successfully refreshed from Google Patents.
US2648090A
Expired / Lapsed
US
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Vacuum cleaner furniture guard
Assignee: BIRTMAN ELECTRIC Co
•
Filing: 1946-11-08
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Granted: 1953-08-11
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Expires: 1966-11-08
Abstract
No abstract record available.
Inventors
- 👤 Frank S Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:30
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |