Patent US3217798A successfully refreshed from Google Patents.
Patent US2680867A successfully refreshed from Google Patents.
US2680867A
Expired / Lapsed
US
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Sponge-type mop with two-part hinged backing plate
Assignee: Individual
•
Filing: 1949-11-21
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Granted: 1954-06-15
•
Expires: 1969-11-21
Abstract
No abstract record available.
Inventors
- 👤 Hall Ralph Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:02
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/14; A47L13/146; A47L1/00; A47L1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US908953A
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US1502148A
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DE596139C
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US2044075A
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FR807925A
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US2251384A
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US2413872A
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US2486102A
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US2548331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |