US2660747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sponge cleaning device
Assignee: Individual
•
Filing: 1950-03-25
•
Granted: 1953-12-01
•
Expires: 1970-03-25
Abstract
No abstract record available.
Inventors
- 👤 Sidney P Vaughn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:24
CPC Classifications
A; A47; A47L; A47L1/00; A47L1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB396469A
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US2070123A
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US2110188A
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US2150196A
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US2153601A
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US2224462A
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US2251384A
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US2225101A
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US2358673A
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US2517213A
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US2486102A
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US2515403A
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US2594553A
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US2533706A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |