Patent US2446985A successfully refreshed from Google Patents.
US2446985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner having a floating nozzle
Assignee: Singer Co
•
Filing: 1944-06-01
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Granted: 1948-08-10
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Expires: 1964-06-01
Abstract
No abstract record available.
Inventors
- 👤 Howard A Shumaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:03
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191016679A
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US1766425A
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US1557747A
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US2175639A
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US2055734A
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US2202980A
Cited
GB523551A
Cited
US2202788A
Cited
US2343227A
Cited
US2381710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |