US2454314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: AT&T Inc
•
Filing: 1946-09-20
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Granted: 1948-11-23
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Expires: 1966-09-20
Abstract
No abstract record available.
Inventors
- 👤 Edgar W Gent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:53
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2836; A47L9/2842; A43; A43D; A43D21/00; A43D21/12; A43D21/127; A47L5/00; A47L5/12; A47L5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |