Patent US2245989A successfully refreshed from Google Patents.
US2245989A
Expired / Lapsed
US
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Suction device for vacuum cleaners
Assignee: QUADREX CORP
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Filing: 1939-07-27
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Granted: 1941-06-17
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Expires: 1959-07-27
Abstract
No abstract record available.
Inventors
- 👤 Leathers Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:29
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-06-16 | 1944-12-16 | 1945-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-16 | 1948-12-16 | 1949-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-16 | 1952-12-16 | 1953-06-17 | $7700.00 | Window Closed / Lapsed |