Patent US3961913A successfully refreshed from Google Patents.
Patent US2184441A successfully refreshed from Google Patents.
US2184441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction cleaner
Assignee: Hoover Co
•
Filing: 1938-05-09
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Granted: 1939-12-26
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Expires: 1958-05-09
Abstract
No abstract record available.
Inventors
- 👤 Donald G Smellie
- 👤 Walter C Eberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:29
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/009; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/30
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) | 1942-12-25 | 1943-06-26 | 1943-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-25 | 1947-06-26 | 1947-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-25 | 1951-06-26 | 1951-12-26 | $7700.00 | Window Closed / Lapsed |