US2738538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction cleaner having filter structure encasing and supported by an electric cord
Assignee: Hoover Co
•
Filing: 1951-04-03
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Granted: 1956-03-20
•
Expires: 1971-04-03
Abstract
No abstract record available.
Inventors
- 👤 John E Vance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:53
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1427; A47L9/28; A47L9/2836; A47L9/2842; A47L9/2857; A47L9/2868; A47L9/2889
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20489E
Cited
US2095466A
Cited
DE643648C
Cited
US2176467A
Cited
US2083915A
Cited
US2633596A
Cited
US2610702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |