Patent US2844840A successfully refreshed from Google Patents.
US2844840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination wet mop, dry mop, and vacuum cleaner
Assignee: Individual
•
Filing: 1955-04-22
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Granted: 1958-07-29
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Expires: 1975-04-22
Abstract
No abstract record available.
Inventors
- 👤 Ruben L Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:24
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4088; A47L11/29; A47L11/30; A47L11/4013; A47L11/4016; A47L11/4027; A47L11/403; A47L11/4036; A47L11/4044; A47L11/4083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1929345A
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US2202989A
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US2348861A
Cited
US2549181A
Cited
GB676158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |