US2649609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust agitator supporting means for ambulatory vacuum cleaners
Assignee: Singer Co
•
Filing: 1949-03-10
•
Granted: 1953-08-25
•
Expires: 1969-03-10
Abstract
No abstract record available.
Inventors
- 👤 Edgar P Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:35
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1591325A
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US1542597A
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US1854042A
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US1644169A
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US1827402A
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US1815225A
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US2140143A
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US2103054A
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US2229229A
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US2345514A
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US2416418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |